It depends on the backup software you are using. If your are using a continuous data backup software you don't have to perform manual backups. Use a program like Genie timeline or backup manger for an easy to use yet powerful solution.
full back up
Full
Backup is the process of making sure there is another copy of each file in case there is a disaster. Restoring is the process of bringing back a copy of a file or directory, etc., from the backup media.
get a data recovery program
A full backup will make a replica of every file currently on the system and store it, usually in a compressed file, for later use if there is a problem. A full backup takes no account of changes made to files since the last backup - it simply copies everything. Therefore it is sensible to only carry out a partial backup if you are short of time or hard drive space.
Just another copy of the file.
The files which store the copy of your original data are called backup files. In windows backup files are created by NTbackup utility and windows backup and restore utilities. These backup files have .bkf file extension.
The is SketchUp's backup file. You will need a copy of SketchUp to view the file. If it won't open then rename the extension ".skp" and it should open.
Anal-file
backup
File extention (.bak, .backup or similar) Size, depending on how big the backup is.. it can be as big as two terabytes (tb).
The best backup solution is to copy and paste documents. This makes it so if something happens to the original file, it can be replaced by the backup file you created.