I recently purchased a 8Gb USB pen drive and started to use it only to find that it does not appear to be holding transferred information
Files appear to transfer OK and can be opened form the new pen drive. However when the drive is removed and reinserted into the same, or another, machine then the files are no longer present. Any ideas what might be going wrong?

this might effect your usb drive; always click the safely remover hard ware icon in toe lower left of your screen