backups
 

i need to make backups and the amount of information is around 200GB. i was planning to make backups every week and i am looking for a way to do it.
is it possible to do it with cron, replacing the files that were modified since the last backup?

Look into rsync or tar - these are commonly used in conjunction with cron to create periodic backups. My personal preference is rsync, which can send the backup to a server or to a local disk, depending on your set up.

There is also cp with the --update and -a switches therefore only copying files which are newer than those at the destination, and preserving permissions.