Please see:

https://urldefense.proofpoint.com/v2/url?u=https-3A__www.linuxandubuntu.com_home_best-2Dlinux-2Dbackup-2Dsoftware&d=DwICaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=5UcbCwGjjAIcjkdEZhYVj0cw4Pcf46i9_hrtNwcfGaI&s=huhszIYFVUpPjeU0-LQGlbxecI4URt0Y7GBf1uO1bY4&e= 

     HomeSystem AdministrationBest Linux Backup Software For Desktops 
And Servers [2021]

System Administration
Best Linux Backup Software For Desktops And Servers [2021]
by Sohail August 3, 2021

1. Timeshift (For desktops)

end excerpt.

Does anyone have experience with Timeshift?  I have just configured a 
Linux laptop for a (retired) colleague who still is an academic journal 
editor.  The colleague is an end-user with no real understanding of 
computers or computation much beyond how to use particular end-user GUI 
applications -- the computer is a tool, but is not interested in how the 
tool actually "works".

Assuming that she obtains a, say 1 Tbyte, external USB drive (powered 
from the USB port and either mechanical or SSD), she plans to do 
incremental backups to the backup drive.

What (if any) applications would anyone recommend?  The end-user IS not 
a systems person and does not write "real" programs (but does have 
"formulae" in a spreadsheet applications).

Thanks for any insight.