Back Up Your Web Site Data!
We've seen an increase in the attacks aimed at inserting malware or backdoors into a web site, and backing up your data is important as cleaning up an infected web site is a tedious and time-consuming process
We do backup our servers for disaster-recovery, but restoring a single web site from those archives is a highly manual process and takes a few hours, so we highly recommend Backing up your data from your Plesk panel.
This way you will be able to restore at your convenience.
Backup Your data every time you make significant update to your web site content or Application.