USB 3.1 WriteBlocker

USB 3.1 WriteBlocker


Fast forensic access to USB storage devices


Read-only access to 3 USB 3.1/3.0/2.0 storage devices at the same time; bus-powerable


Product name USB 3.1 WriteBlocker
Patent U.S. Patent No. 10,430,361
Host (I/O) Ports (1) USB 3.2 Gen 2 Type-C: up to 10 Gbps
Drive Types Supported USB Thumb Drives

USB drives via USB cable (if the device class is USB Mass Storage Device and it does not use proprietary firmware)

Number of LEDs 1
Description of LEDs Power/Authentication status
Operating system compatibility Windows 10 and 8.1 (note: virtual machines not supported)
Construction material(s) ABS
Power input connector Barrel connector (center pin positive)
Bus power Yes (one port)
Dimensions 3.43″ x 2.05″ x 1.02″ (87mm x 52mm x 26mm)
Weight 0.13 lbs. (0.06 kg)
Write Blocking Yes
Write Blocked ports Two USB 3.2 Gen 2 Type-C, one USB 3.0 Type-A
Compliancy FCC, CE, RoHS, RCM
Warranty CRU provides a 3-year limited warranty for this product.
Technical Support Your investment in CRU products is backed up by our free technical support for the lifetime of the product. If you need to contact us for any reason, visit or call us at 1-800-260-9800 or +1-360-816-1800.

About USB 3.1 WriteBlocker


Digital forensics investigators, lawyers, and corporate IT staff who want to view, examine, and image drives quickly and easily, look to the CRU® WiebeTech® USB 3.1 WriteBlocker™ to ensure they are protecting and not altering data.


The handheld and lightweight USB 3.1 WriteBlocker connects via a Windows operating system host’s USB 3.1 interface to allow investigators and technicians to look through the contents of a drive without risking any damage or disruption of source data. Simply use the included USB 3.1 cable to connect the USB 3.1 WriteBlocker to the drive or drives you wish to inspect.


Additional features:


  • Bus powered
  • Status LED indicates if drive is safe to inspect
  • Industry-leading 3-year warranty
  • Free, US-based customer support


The WiebeTech WriteBlocking Validation Utility, our complimentary Windows application, tests the reliability of any write blocker available, hardware or software.


  • Native USB 3.1 write blocking with extraordinary speeds
  • Reliable evidence protection
  • Simultaneous write blocking of three devices


Included Items
  • USB 3.x cable (type C to C)
  • USB 3.0 cable (type C to A)
  • AC adapter
  • Quick start guide
  • USB thumb drive containing drivers and related files