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.
Why would it be in Russian with a language script that sounds fishy to me to not be able to select a language from the installer if it does supposedly have English. No offence although you can't be too trusting of anything these days if your gut tells you otherwise.