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Describes what the lights do when a copy fails

xiaobi dual-bay SATA dock, USB-C and USB-B, USB 3.0 at 5 Gbps, offline copy, RGB switch

The dock that describes its own failure state — four blue lights blinking means the copy did not work — and the only one here with a switch to turn its lighting off.

Xiaobi dual-bay drive docking station with RGB lighting and two drive slots

xiaobi dual-bay SATA dock, USB-C and USB-B, USB 3.0 at 5 Gbps, offline copy, RGB switch

The dock that describes its own failure state — four blue lights blinking means the copy did not work — and the only one here with a switch to turn its lighting off.

Bay count
Two — stated in the title and in the first bullet, which describes two SATA drive interfaces alongside a Type-C socket, a USB-B socket and separate power and RGB buttons
Supported drive sizes
2.5-inch and 3.5-inch — stated in the title and in the third bullet
Supported drive interfaces
SATA hard discs and solid-state drives — stated in the third bullet. No SATA revision is named
Solid-state slot support
Not published on the listing — no M.2 position is named. Solid-state drives are supported in the two SATA bays and no separate slot exists
Offline cloning
Stated — the second bullet describes copying from one SATA drive to another with a switch and no software or tools, and adds three marked notes: use a larger destination, disconnect the PC during the copy, make sure the destination capacity is at least as large as the source, and read four blinking blue LEDs as a failed copy
Interface standard
USB 3.0 — stated in the fourth bullet as supporting extremely fast USB 3.0 data transfer
Stated link rate
Up to 5 Gbit/s — stated in the fourth bullet
Connector type
A Type-C socket and a USB-B socket on the dock, with a USB-B to USB-C cable and a USB-A adapter supplied — stated in the first and sixth bullets. It is the only dock on this shelf to publish both its sockets and its cable
UASP support
Not published on the listing — UASP is not named anywhere in the six bullets. Fourteen of the nineteen listings in this lot publish it, so the silence is worth noticing
Power supply
Not published on the listing — no adapter, no voltage and no current is named, on a dock stated to take two 3.5-inch drives
Per-bay controls
Separate power and RGB buttons are stated in the first bullet, with the RGB switch on the rear named again in the fifth. Neither is per-bay: no individual bay switch and no per-bay indicator is published
Amazon reference
B0GGR3P52T (same reference on 6 Amazon marketplaces)
EAN
0635393178823
  • Describes the failure signal, four blinking blue lights, which nothing else in this lot does
  • Publishes both its sockets and the cable and adapter supplied
  • Two capacity figures in one bullet, 16 TB each and 20 TB for a single drive

Best for: A desk where drives are copied often and the operator wants to know from across the room whether it worked.

≈ $35 / £27 / 25 €
Check price on Amazon

Specifications

Bay count
Two — stated in the title and in the first bullet, which describes two SATA drive interfaces alongside a Type-C socket, a USB-B socket and separate power and RGB buttons
Supported drive sizes
2.5-inch and 3.5-inch — stated in the title and in the third bullet
Supported drive interfaces
SATA hard discs and solid-state drives — stated in the third bullet. No SATA revision is named
Solid-state slot support
Not published on the listing — no M.2 position is named. Solid-state drives are supported in the two SATA bays and no separate slot exists
Offline cloning
Stated — the second bullet describes copying from one SATA drive to another with a switch and no software or tools, and adds three marked notes: use a larger destination, disconnect the PC during the copy, make sure the destination capacity is at least as large as the source, and read four blinking blue LEDs as a failed copy
Interface standard
USB 3.0 — stated in the fourth bullet as supporting extremely fast USB 3.0 data transfer
Stated link rate
Up to 5 Gbit/s — stated in the fourth bullet
Connector type
A Type-C socket and a USB-B socket on the dock, with a USB-B to USB-C cable and a USB-A adapter supplied — stated in the first and sixth bullets. It is the only dock on this shelf to publish both its sockets and its cable
UASP support
Not published on the listing — UASP is not named anywhere in the six bullets. Fourteen of the nineteen listings in this lot publish it, so the silence is worth noticing
Power supply
Not published on the listing — no adapter, no voltage and no current is named, on a dock stated to take two 3.5-inch drives
Per-bay controls
Separate power and RGB buttons are stated in the first bullet, with the RGB switch on the rear named again in the fifth. Neither is per-bay: no individual bay switch and no per-bay indicator is published
Amazon reference
B0GGR3P52T (same reference on 6 Amazon marketplaces)
EAN
0635393178823

On the listing

A dual-bay SATA drive docking station for 2.5-inch and 3.5-inch HDDs and SSDs, with two SATA interfaces, a Type-C socket, a USB-B socket and separate power and RGB buttons, with a note that macOS is supported and that compatibility with particular file systems may vary; an offline copy function needing no software or tools, with marked notes to use a larger destination, to disconnect the PC during the copy, to ensure the destination is at least as large as the source, and to read four blinking blue LEDs as a failed copy; support for up to 32 TB as 16 TB × 2 with a single drive supporting up to 20 TB, plug and play with no tools or drivers and a note that new drives must be initialised first; USB 3.0 transfer at up to 5 Gbit/s; intelligent RGB lighting showing the status by a breathing pattern, switchable off with the RGB button on the rear; and a package containing a USB-B to USB-C cable and a USB-A adapter.

The failure signal

Four blinking blue LEDs means the copy did not work. One listing in nineteen tells you that.

Every dock on this shelf has lights. Almost none of them describes what the lights say, and the pattern nobody ever documents is the one that matters — the one that means stop, this did not happen.

Without it, a failed clone is found out later: the destination drive goes into a machine, is unreadable, and the source is now the only copy of something that was supposed to have two.

The second bullet also carries the two instructions that go with it: use a larger destination, and disconnect the computer while the copy runs. Both are the sort of thing that ends up in a manual nobody opens.

Sockets and cable, both published

The first and sixth bullets between them do something no other dock in this hub manages: they say what is on the dock and what is in the box.

On the dock: a Type-C socket and a USB-B socket. In the box: a USB-B to USB-C cable and a USB-A adapter.

That covers a modern laptop and an older desktop from one package, and it means nobody has to guess which end of what is needed. Five of the seven docks here never name a connector at all.

Two capacity figures

The third bullet gives 32 TB as 16 TB × 2, and then says a single drive supports up to 20 TB.

Both are printed. Read together they suggest a per-bay ceiling that depends on how many bays are occupied, which is a reasonable interpretation and not one the page makes. This site reports the two figures rather than reconciling them.

For most buyers it is academic. For anyone with a 20 TB drive and a second drive to go beside it, it is the question to ask before ordering.

The lighting, and the switch

The fifth bullet describes RGB lighting with a breathing pattern indicating status, and says it can be turned off with a switch on the back.

The switch is the part worth praising. Illuminated computer equipment is a matter of taste, and a dock is often the thing sitting in a bedroom or a study where a slow pulsing glow at two in the morning is not what anybody wanted. Making it optional costs nothing and settles the argument.

No UASP, and no supply rating

No UASP anywhere. No power supply, no voltage, no current, on a dock that takes two 3.5-inch mechanisms and therefore cannot run without a mains adapter.

Both silences are the same shape as on the two docks either side of this one in price, and the second is the one with practical consequences.

Before ordering

Ask what adapter is in the box and how it is rated. Confirm the capacity question if a 20 TB drive is involved. And note the instruction the second bullet gives: disconnect the computer before starting a copy, and watch for four blue lights.

Availability

Priced at roughly 25 € on the German Amazon store the day this page was checked.

It is stocked on the American and British Amazon stores as well, in that country’s own currency. The range above leaves those out: it counts euro stores and no others.

The French and Italian Amazon price runs past 1.6× the cheapest store. A gap that size normally marks a reshipper and not a seller in the country, so those listings stay out of the range above.

In the Spanish Amazon catalogue with no live offer against it: the reference exists, nobody is filling it.

Every figure in this section is what Keepa held on the day this page was last updated. Stock and prices move without warning.

Prices quoted in this text were read on 10 September 2026. The live price is at the top of the page.

More drive docks

  • BENFEI black dual-bay drive docking station with a clone button and a power switch

    BENFEI dual-bay SATA dock, USB 3.0 at 5 Gbps, offline clone on a three-second press, 12 V/2.5 A supply

    The dock that publishes the two things most of this shelf leaves out — a 12 V/2.5 A supply rated for two spinning drives, and a power switch to protect them while they are fitted.

    Bay count
    Two — stated in the title and in the first bullet, which describes reading, writing and transferring in parallel between two 2.5-inch or 3.5-inch drives
    Supported drive sizes
    2.5-inch and 3.5-inch — stated in the title and in the first bullet
    Supported drive interfaces
    SATA hard discs and solid-state drives — stated in the title and in the first bullet. No SATA revision is named
    Solid-state slot support
    Not published on the listing — no M.2 position is named. Solid-state drives are supported in the two SATA bays and no separate slot exists
    Offline cloning
    Stated — the second bullet says the CLONE button is held for three seconds to transfer all data from the source drive to the destination without a computer, and notes that the destination must be equal to or larger than the source
    Interface standard
    Two designations are published: the title says USB 3.0 and the third bullet says USB 3.1 Gen 1. Both are printed and neither is withdrawn
    Stated link rate
    Up to 5 Gbit/s — stated in the title and in the third bullet
    Connector type
    Type-C — stated in the title as a USB-C docking station. No cable is named in any bullet
    UASP support
    Stated — the third bullet names UASP, the USB Attached SCSI Protocol, and claims it speeds transfers by up to 20 % against conventional USB 3.0. The same maker’s 2.5-inch enclosure on the enclosures shelf of this site puts the figure at 70 %
    Power supply
    A dedicated 12 V/2.5 A adapter — stated in the fourth bullet, which says it gives a stable supply to both bays and reliable operation even with two demanding 3.5-inch hard discs. It is the higher of the two current ratings published on this shelf
    Per-bay controls
    A single integrated power switch is stated in the fourth bullet, described as protecting the drives while they are connected and removed, with an instruction to switch the unit off before fitting or removing a drive. No per-bay switch and no per-bay indicator is published
    Amazon reference
    B0GTVMFGPT (same reference on 5 Amazon marketplaces)
    EAN
    6971785945371
    • Publishes the power supply with both figures, 12 V and 2.5 A
    • A power switch, with an instruction saying when to use it
    • USB 3.0 in the title and USB 3.1 Gen 1 in the bullets, with nothing reconciling them

    Best for: Two 3.5-inch mechanisms running at once, where the supply rating and the switch are the reasons to pay more than the cheaper docks here cost.

    ≈ 24 €
    Check price on Amazon
  • FIDECO black dual-bay drive docking station with two drive slots and a clone button

    FIDECO dual-bay SATA dock, USB 3.0 at 5 Gbps, offline clone on a five-second press, 2 × 12 TB

    The cheapest dock in this hub, and the one that tells you exactly how the copy is started: hold Clone for five seconds until the light blinks, with no computer attached.

    Bay count
    Two — stated in the third and fourth bullets, which describe two drives put into their respective slots and two drives supported at the same time
    Supported drive sizes
    2.5-inch and 3.5-inch — stated in the title and in the fourth and fifth bullets, which describe the flexibility of connecting two drives of either size to a computer
    Supported drive interfaces
    SATA I, II and III, hard discs and solid-state drives — stated in the fourth bullet, with the first adding that only SATA drives and SSDs are supported
    Solid-state slot support
    Not published on the listing — no M.2 position of any kind is named. Solid-state drives are supported in the two SATA bays and no separate slot exists
    Offline cloning
    Stated — the third bullet says two drives are put in their slots and the Clone button held for five seconds until the LED blinks, and that the copy is completed without a computer. It is the only listing on this shelf to publish both the duration of the press and the signal that confirms it
    Interface standard
    USB 3.0 — stated in the title and in the second bullet
    Stated link rate
    Up to 5 Gbps — stated in the second bullet as a very fast data transfer speed over USB 3.0
    Connector type
    Not published on the listing — no socket and no cable is named in any bullet
    UASP support
    Not published on the listing — UASP is not named anywhere. Fourteen of the nineteen listings in this lot publish it, so the silence here is worth noticing rather than assuming
    Power supply
    Not published on the listing — no adapter, no voltage and no current is named, on a dock that accepts two 3.5-inch drives at once and cannot run from a USB port
    Per-bay controls
    Not published on the listing — no power switch and no per-bay light is named. The third bullet describes a single LED that blinks when the clone starts
    Amazon reference
    B08291CB6J (same reference on 6 Amazon marketplaces)
    EAN
    0751450850409
    • Publishes the length of the button press and the signal that confirms it
    • Two bays at the lowest price in this hub
    • No power supply named at all, on a dock built for two 3.5-inch drives

    Best for: Reading a pile of old SATA drives one after another, on a desk where the copy button is the reason for buying rather than the transfer rate.

    ≈ $25 / £30 / 24 €
    Check price on Amazon
  • GRAUGEAR M.2 docking station with a top slot and a cooling fan

    GRAUGEAR single-slot M.2 dock for NVMe and SATA, RTL9210B, 2230 to 22110, active fan

    The one dock in this hub with no SATA bay at all: a single M.2 slot with active cooling, the only listing anywhere in this lot to accept a 22110 module.

    Bay count
    One — a single M.2 slot. No 2.5-inch or 3.5-inch bay exists, which makes it the only dock on this shelf that will not take a conventional drive at all
    Supported drive sizes
    M.2 modules only — the third bullet names all common M.2 formats from 2230 to 2280 and adds 22110, which no other listing in this lot mentions
    Supported drive interfaces
    NVMe M.2 SSDs in M-key and SATA NGFF SSDs in M+B key — stated in the second bullet, which credits the RTL9210B chipset with the dual support
    Solid-state slot support
    The whole device is one — the M.2 slot is the only position, and it accepts both the NVMe and the SATA protocol. Every other dock on this shelf has SATA bays and, in one case, an M.2 slot alongside them
    Offline cloning
    Not published on the listing — no clone button and no copy function is named in any of the five bullets. With a single slot there is no second drive to copy to
    Interface standard
    USB with the RTL9210B chipset — stated in the second bullet. The USB generation is not named in words; the first bullet gives the rate instead
    Stated link rate
    Up to 10 Gbit/s for a PCIe 3.0 x2 NVMe SSD, and up to 6 Gbit/s for a SATA SSD — both stated in the first bullet, which is the only listing in this lot to publish a separate figure for each protocol
    Connector type
    Not published on the listing — no Type-C, Type-A or cable is named in any bullet
    UASP support
    Not published on the listing — UASP is not named anywhere. Fourteen of the nineteen listings in this lot publish it
    Power supply
    Not published on the listing — no adapter, voltage or current is named. An M.2 module and a small fan are a modest load, and the page does not say whether the dock runs from the lead
    Per-bay controls
    Not published on the listing — no switch and no indicator is named. The third bullet supplies an acrylic cylinder for storing and protecting an M.2 drive, which is a case rather than a control
    Amazon reference
    B0BGJKVSKT (same reference on 6 Amazon marketplaces)
    EAN
    4260746550467
    • A fan inside, which nothing else in this lot has
    • Accepts 22110 modules, the only listing here to name that length
    • No SATA bay at all, so a 2.5-inch or 3.5-inch drive will not go near it

    Best for: A desk where M.2 modules are read and imaged one after another and the drive has to stay cool while it happens.

    ≈ 38 €
    Check price on Amazon

Others worth having spare

  • Elfcam long simplex fibre patch cable with green LC/APC connectors at both ends

    Elfcam 30 m simplex OS2 LC/APC to LC/APC, 9/125 µm, 7.5 mm bend radius

    The longest lead in this hub by a wide margin, published with a bend radius and a bend-tolerant fibre conformity — and with two of its own descriptions at odds, on the jacket colour and on the jacket material.

    Fibre type
    Single-mode, 9/125 µm — stated in the title and in the first bullet, which describes the lead as running between a fibre termination point and an ONT
    Fibre grade
    OS2 — stated in the first and fourth bullets, with conformity to G.657.A2 and B2 named in the first and a minimum bend radius of 7.5 mm given immediately beside it
    Connector types at each end
    LC/APC at both ends — stated in the title and in the first bullet, and the fourth adds that every lead is supplied with dust caps
    Simplex or duplex
    Simplex — stated in the title and in the first bullet. One strand, one connector at each end
    Polarity arrangement
    Not published on the listing, and a simplex lead has no pair to cross
    Length
    30 m — stated in the title twice over. The fifth bullet gives the range the lead is sold in, from 0.5 m to 100 m
    Jacket rating
    LSZH — stated in the first bullet. The third then describes the outer sheath as a halogen-free, flame-retardant copolymer and names an inner sheath of PVC, which is the only mention of PVC on the page and sits awkwardly beside the LSZH claim
    Polish type
    APC — carried by the LC/APC designation at both ends. No angle, no insertion loss and no return loss figure is published; the fourth bullet says instead that leads are individually packed and supplied with a measurement report
    Armouring
    Not published on the listing — the third bullet names a filled loose tube and non-metallic strength members, which is a construction rather than an armour, and describes the lead as an indoor cable for laying inside buildings
    Amazon reference
    B091G2CN9D (same reference on 6 Amazon marketplaces)
    EAN
    0037603250037
    • Thirty metres, the longest lead on this shelf by a wide margin
    • A minimum bend radius is printed, which matters most on the longest run here
    • The jacket is white in the title and in the first bullet, and yellow in the fourth

    Best for: A long indoor run between a fibre termination point and a router at the other end of a flat, where 30 m of LC/APC is simply what the job needs.

    ≈ £24 / 25 €
    Check price on Amazon
  • FLYPROFiber aqua duplex OM4 fibre patch cable with LC connectors and A and B labelled clips

    FLYPROFiber 1 m duplex OM4 LC to LC, 50/125 µm, UPC polish, A/B labelled clips

    The only multimode lead here with a full reach table behind it — four rates, four distances, all at 850 nm — and the only one on this shelf whose duplex clip is marked A and B so a cabinet can be read at patching time.

    Fibre type
    Multimode, 50/125 µm — stated in the title and in the third bullet, which calls the fibre insensitive to bending, easy to strip and easy to splice
    Fibre grade
    OM4 — stated in the title and in the first bullet, with a bandwidth of 2000 MHz·km at 850 nm given in the second. The first bullet calls OM4 the preferred fibre specification for 40G and 100G applications
    Connector types at each end
    LC at both ends — stated in the title and in the first bullet, which names 40G BIDI SR, 10G SR, QSFP+ and SFP+ transceivers as what it is meant to join
    Simplex or duplex
    Duplex — stated in the title as 40 GB/100 GB Duplex and in the first bullet as an LC-LC duplex patch cable
    Polarity arrangement
    Embossed A and B position labels on the duplex clip and on the marking ring — stated in the fourth bullet, whose stated purpose is quick identification of Tx and Rx during installation, testing and fault finding. Whether the pair is supplied crossed is not published on the listing; the same bullet names adjustable connector clips, which is how a pair is rearranged by hand
    Length
    1 m — stated in the title, which also gives the range the lead is sold in, from 0.2 m to 100 m
    Jacket rating
    LSZH — stated in the title and in the fourth bullet, which calls the jacket an environmentally friendly LSZH sheath
    Polish type
    UPC — stated in the fourth bullet as a high-grade UPC polish on zirconia ceramic ferrules made in Japan. The third bullet quotes an insertion loss of 0.3 dB or less and a return loss of 30 dB or better
    Armouring
    Not published on the listing — no armour is named. The third bullet gives a minimum bend radius of 7.5 mm instead, and offers the lead for cabinets requiring twenty or more bends and for high-density installations in very small spaces
    Amazon reference
    B09C224CLK (same reference on 5 Amazon marketplaces)
    EAN
    0649910317572
    • Four ethernet distances at four rates, all quoted at 850 nm, the fullest reach table on this shelf
    • A and B labels embossed on the clip and the marking ring, so Tx and Rx can be read by eye
    • The four distances belong to the fibre, and the lead in the bag is 1 m long

    Best for: A short OM4 hop between two SFP+ cages in the same cabinet, where the A and B labels earn their keep every time the patching changes.

    ≈ 8 €
    Check price on Amazon
  • HB-DIGITAL yellow duplex fibre patch cable with green LC/APC connectors at both ends

    HB-DIGITAL 1 m duplex OS2 LC/APC to LC/APC, 9/125 µm, LSZH

    The cheapest lead on this shelf and one of the best documented, with a sub-grade named, both loss figures printed and a connector standard cited by number — and no word at all about which way its two strands are arranged.

    Fibre type
    Single-mode, 9/125 µm — stated in the title and in the first bullet, which calls it a high-grade single-mode fibre patch cable
    Fibre grade
    OS2, with the sub-grade G657.A2 named in brackets in the first bullet. Three of the seven leads on this shelf qualify their grade with a G.65x designation and this is one of them
    Connector types at each end
    LC/APC at both ends — stated in the title and in the first bullet, which names the duplex connectors explicitly
    Simplex or duplex
    Duplex — stated in the title, and described in the third bullet as two 2.0 mm fibre lines in a stable parallel arrangement, quoted as 2 × 2.0 mm, said to suit applications with double or redundant connections
    Polarity arrangement
    Not published on the listing — nothing says whether the pair arrives crossed, and no A or B marking is described anywhere. The third bullet describes the parallel construction and stops there
    Length
    1 m — stated in the title. Three of the seven leads on this shelf are 1 m and this is one of them
    Jacket rating
    LSZH — stated in the title and in the fourth bullet, which spells out Low Smoke Zero Halogen and calls the material flame-retardant and low-smoke, suited to interiors, public buildings and technical installations
    Polish type
    APC — carried by the LC/APC designation at both ends. The first bullet quotes an insertion loss of 0.3 dB or less and a return loss of 60 dB or better, the highest return loss figure published on this shelf
    Armouring
    Not published on the listing — no armour, no steel braid and no rodent protection is named. The fifth bullet offers manufacture to IEC 61754-20, testing of every lead for insertion and return loss, and an operating range of -40 °C to +85 °C instead
    Amazon reference
    B0G1YV54TB (same reference on 4 Amazon marketplaces)
    EAN
    4063328061418
    • Both loss figures are printed, and the return loss figure is the highest quoted here
    • The grade is qualified as G657.A2 rather than left at two characters
    • Polarity is never described, on a duplex lead where it decides whether the link comes up

    Best for: The short hop between a fibre termination point and an ONT, where both ends are already LC/APC and a metre is all the run needs.

    ≈ 7 €
    Check price on Amazon

All drive docks