I use Eraser to try to safely erase any content present on my USB flash drive. After the erasure, I read in the log:
Session: Monday, March 27, 2017 6:13:52 PM
Monday, March 27, 2017 6:13:52 PM Warning This computer has had System Restore or Volume Shadow Copies enabled. This may allow copies of files stored on the disk to be recovered and pose a security concern.
Does it mean the USB flash drive still contains any copies of files? or are these copies of files stored in a different drive?
I use Windows 7 SP1 x64 Ultimate and Eraser 184.108.40.20679.