the process of copying your files onto removable media This gives you a copy of the files that you can recover from if something happens to the original copy
to print the second side of printed sheet Also, to make a duplicate of a computer file as a precaution against losing the original
Printing the reverse side of a sheet already printed on one side In electrotyping, backing a copper shell with metal to make the plate the required thickness
Copying some or all of the files on your Mac to different disks or tape, so you won't lose the information if the original versions are damaged, lost, or stolen The copied files are called backups
Making a copy of a computer file for use if the original is lost, damaged, or destroyed Sometimes called archiving See also DUMPING