Replaced dead HDD with new HDD running Ubuntu 20.04 and backup?

[rapidrob]

My Linux Lite HDD died and could not be booted. I had a drive with 18 LTS and installed it and upgraded to 20.04 LTS. My Back-up HDD was done on my Linux Lite HDD and has many GB's of my stored data.
Can I use the new Ubuntu 20,04 OS HDD and do a restore off of my back-up HHD that was done in Linux Lite?
Thank you.

[Impavidus]

Yes, if it's a proper backup of your documents, you can restore it to a different system.

[rapidrob]

It is not obvious on how to do this. If I use the Ubuntu restore from back up it says there is nit any. But the back up drive is 85% full of linux lite back ups.
How do I restore these files?

[Impavidus]

How did you create that backup? How are the files stored? I don't use any of those fancy backup tools, but some home-made script. That makes it easy to restore, even if the original tool isn't available.

[rapidrob]

I used the built in "backup" program. I am not a source code writer let alone even understand it.
I have several hundred backup files in the format of:
duplicity-full.20200410T185905Z.vol1.difftar
(this is the first in line file)