USB 3.0 WriteBlocker

This product is discontinued

USB 3.0 WriteBlocker has been discontinued.

For a current similar product, we recommend: USB 3.1 WriteBlocker

    • Native USB 3.0 write blocking at USB 3.0 speeds
    • Reliable evidence protection
    • Simultaneous write blocking of two hard drives at full bandwidth
Use the pocket-size USB 3.0 WriteBlocker™ for fast forensic access to USB 3.0 storage devices. Despite its size, it offers incredible performance and is an essential device in any digital investigator's toolkit.

Sending your message. Please wait...

Thanks for sending your message! We'll get back to you shortly.

There was a problem sending your message. Please try again.

Please complete all the fields in the form before sending.

Please enter a valid email address before sending.



Technical Specs

Product name USB 3.0 WriteBlocker
Patent U.S. Patent No. 10,430,361
Host (I/O) Ports (1) USB 3.0: up to 5 Gbps
Drive Types Supported
  • USB Thumb Drives USB 3.1/3.0/2.0 thumb drives with either a Type-A or Type-C connector
  • 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 7, 8.1, or 10 (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 Dual USB 3.0
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.
Resources and Documents

Product Description



Related Products


Products and Accessories

USB 3.0 WriteBlocker
Read-only access to 2 USB 3.0 storage devices at the same time; bus-powerable
US plug
part #: 31350-1279-0000

US, UK, EU, & Aus plugs
part #: 31359-1279-0000