Check Flash (ChkFlsh) is a very simple flash drive testing and maintaining tool. This tool can be used to run a burn in read and write test on the USB flash drive. If it is able to survive after a few cycle, the USB flash drive should be OK. There are 3 access types and 5 action types for you to select. Other than checking for drive errors, it can also determine the read and write speed.
Check Flash is a free and single portable executable file. It can only test USB flash drives, and cannot be used for other external storage devices such as HDD.
Hope you benefit from it