Install Acronis driver updates to resolve the issue
This article applies to:
After installation of the above-mentioned Acronis products, some brands of USB flash drives and USB hard disks are not detected in My Computer in Windows.
Issue in the product.
Acronis drivers are not compatible with certain flash drive controllers.
For Acronis True Image Home 2012:
For Acronis Backup & Recovery 11:
(!) This article applies to detection of USB devices in Windows. If devices are detected in Windows but not detected in Acronis product itself, see Acronis Product Does Not Detect Hard Disks in Windows.