keep it in your pocket
back ur files up on a memory stick or a external hard drive
make a backup file and get a portable hard drive.
Backup Backup on another medium Backup somewhere else
You should protect files from loss because they are expensive to replace. I have a number of them in my toolbox. I throw them away when they get dull. Some people use old files to make knives. The best ones for this are the ones made in the US.
then your stuff is lost and you won't have a second copy
It could result in the loss of all or some of your files
You must have a back up file available, like a memory - stick or back up disk.
backup it, upload to google documents, upload to sky drive which is free online storage and comes with .live account
A system backup. This typically copies key operating system files and programs, but not user data.
In case of disaster, you should always have backups of important data. Memory sticks and disks make is a very good way for storing significant work on.
Making a backup