USB WriteBlocker

This product is discontinued

USB WriteBlocker has been discontinued.

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

    • Convenient USB write blocking
    • Reliable evidence protection
    • Simple, bus-powered operation
The USB WriteBlocker™ is a professional forensic tool for investigating USB mass storage devices, such as thumb drives. It is relied on by digital investigators, technicians, and IT staff.

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Technical Specs

Product name USB WriteBlocker
Host (I/O) Ports (1) USB 2.0: up to 480 Mbps
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)
Maximum HDD size 2000 GB (1000 GB in a Terabyte)
Number of LEDs 1
Description of LEDs Power, drive access
Operating system compatibility Windows XP or later
Windows Server 2003 or later
Mac OS X
Most modern Linux distributions
Construction material(s) ABS
Bus power Yes
Dimensions 4.13" x 1.02" x 0.63" (105mm x 26mm x 16mm)
Weight 0.10 lbs. (0.05 kg)
Write Blocking Yes
Compliancy FCC, CE, RoHS, C-Tick, RCM
Warranty CRU provides a 2-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



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USB WriteBlocker
Inline USB pass-through device; blocks writes to attached USB mass storage devices; bus-powered
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part #: 30080-0100-0000
Ships in: 1-2 Days