does it support 4tb drives?

This doc supports the MS NTFS file system which is up to 2.19 TB. Also the USB 3.0 control is erratic and doesn't work correctly. The Esata and USB 2.0 works fine. I use it to store movies and tv shows so it is hooked up to my LG Flat Screen television via the USB port.

Does the e-sata support 6 Gbps/e-sata6?

Specs say yes i have it on a 3 gbps e-sata card i tried it first with USB it was terribly slow have had it for quite awhile i use it on a modified HP gt7225 thin client for NAS to store MKV files and serve them to other Thin clients used for media on all my TV's it works well i have had no issues with it at all the only thing i would change is it has a soft power button and when the power goes out it stays off other then that when these 4 2TB green drives are full i will buy another one i am happy i bought it changing drives happens is seconds without cages and screws /clips and all that i dont have to take it off line to change drives each slot has its own power button

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Mediasonic HFD1-SU3S2 2.5" & 3.5" Black SATA USB 3.0 & eSATA ProBox 4-Bay Dock Station

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2.5" & 3.5"
USB 3.0 & eSATA
Support single SATA HDD capacity up to 12TB (OS must support GPT to use value over 2TB)

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Mediasonic ProBox 4 Bay Dock for 2.5' / 3.5' SATA HDD - USB 3.0 SuperSpeed & eSATA (HFD1-SU3S2)
Changing HDDs frequently? Getting tired of running up and down for replacing HDDs in your old hdd enclosure? Mediasonic is now providing you a better solution for your need. Mediasonic HFD1-SU3S2 is a sleek looking design 4 bay docking station which allows you to install 2.5' or 3.5' hard disk drives and move files between your HDDs. It also has Smart Power Sync function for power saving when host computer turns off or standby.

Model
Brand	Mediasonic
Model	HFD1-SU3S2

Details
Color	Black
Size	2.5" & 3.5"
Type	Dock
AC Adapter	Yes
Internal Interface	SATA
External Interface	USB 3.0 & eSATA
Number of Bay	4 Bay
Maximum Capacity (per Bay)	Support single SATA HDD capacity up to 12TB (OS must support GPT to use value over 2TB)
Specifications	Power: Input Voltage: 100 - 240 VAC 4 Bay Docking Station Input frequency: 50 ~ 60 Hz Input current: 1.6A for 100V Output voltage: 12V Output current: 5A Output watt 60W AC Jack type (US Type) Power On / Off button

Compatibility
Operating Systems Supported	Windows XP / VISTA / 7 / 10 Mac OS 10.10.3 or later (Only for USB 2.0)

Features
Features	Individual bay slot design support up to 4 different brand / capacity / model / form factor HDD running concurrently Individual power controller for each dock. User can install or remove a single disk without interrupting the remain HDDs (only available via eSATA connection) Special design sucker feet for steadily use on a desktop. Smart Connect supports USB 3.0 / 2.0 or eSATA interface auto selection. (Device will detect and connect automatically with the interface connected. If both interface were connected, eSATA interface will be activiated). Smart Power sync function supports PC and Toshiba REGZA TV. PC and Toshiba REGZA TV can detect 4-LUN (Host eSATA need to support port multiplier function).

Package Contents
Package Contents	Main Device QIG External Power Adapter Power Cord USB 3.0 Cable (1M) eSATA Cable (1M) Warranty Card

Additional Information
First Listed on Newegg	March 16, 2012

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Limited Warranty period (parts): 1 year
Limited Warranty period (labor): 1 year
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Return for refund within: 30 days
Return for replacement within: 30 days
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Mediasonic HFD1-SU3S2 2.5" & 3.5" Black SATA USB 3.0 & eSATA ProBox 4-Bay Dock Station

Learn more about the Mediasonic HFD1-SU3S2

Customer Reviews of the Mediasonic HFD1-SU3S2

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Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Item#: N82E16817576013

Mediasonic HFD1-SU3S2 2.5" & 3.5" Black SATA USB 3.0 & eSATA ProBox 4-Bay Dock Station

Learn more about the Mediasonic HFD1-SU3S2

Customer Reviews of the Mediasonic HFD1-SU3S2

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info