Do you mean HOW TO ERASE or did they erase by themselves and you want to know why?
I would suggest the same structure as windows. What I mean, is if you look in Explore.exe or Winfile.exe you will see or know what I mean. This you know what and where everything is on your thumb-drive at all times and won't have to go searching for it when you need it.
If you are going to format the drive first then there are two possibilities: 1. You have all system and personal files on one drive. In this case you would lose all your files. 2. You have system files and personal files on different drives. In this case you would only lose the files on the drives that you format. As long as you don't format the drive with your personal files on it you won't lose them.
If you store your backup of your C:\ drive (which is usually where all your files, photos, etc are stored) on another (logical) partition on the same physical drive (C:\) and this is where you store your backup, if the drive should fail you would lose both the original files AND the backup as well. This is because they both reside on the SAME physical drive. Buy an inexpensive thumb drive or external hard drive and store your backups there. This way is the C:\ drive fails, you still have your backup files (on the external or flash (thumb) drive).
yes there is one way to completely erase files would be to fill up a hard drive, format it, fill it up with useless junk, then format it again or you can get a special program like disk cleanup and completely get rid of everything less time consuming but you have to pay for it
You would have to go into the Wii saved files and delete the entire date for the game.
No. You need to have the flash drive unless you copied the files to the PC.
This could happen do it a flash drive virus. Run a complete scan of your flash drive
Yes in the same way as you would with any drive.
Well, anything really, but I would imagine you are thinking of a flash drive (also called pen drive, USB drive, thumb drive, ect.)
No, changing your RAM will not affect your files. Your files are stored on your hard drive, which is a separate piece of hardware from the RAM. Once you shut down your system, your files are safely stored on the hard drive, so adding new RAM or replacing old RAM will have no effect on your files.
SDRAM
You can't, not easily. The partitions (D and C) are set up permanently. In order to change them, you would have to completely erase the hard drive and start over. Its is possible by using partation magic