I have a problem with a SanDisk Cruzer Titanium 16GB USB Flash-Drive. I have been using it to download music, video and photo files from the internet. I received a pop-up message to tell me that the drive was almost full but I tried to download a large video file which may have exceeded the storage capacity of the drive. Since then my PC does not recognise the flash-drive at all, I have tried inserting it into different USB ports on my PC, front and rear, and on my laptop but it doesn't appear to be working at all. Is there any possibility of retrieving these files by purchasing additional 'rescue' software, or by using some other method you may know of? Many thanks to anyone who could help me.