Flash Drives are used for transferring data from one PC to another. These include the pen drive, SSD or the hybrid device or any type of external devices. These may contain some of the problems when your PC are not protected with viruses infections and as a result all the files that are stored on these flash drives becomes shortcuts of files and all of them have a weird type of files extension .src files and even your disc space would be full but you will not able to access your files.  If you want these files back or want to recover them back. Then firstly you need to remove the virus from the flash drive. Then connect the drive to the PC with the latest version of updated antivirus software that can scan and detect the virus and remove them.