What is the best programme to save DVDs to a hard drive? I have an external hard drive of 1 TB. I want to back up some home DVDs as well as some commercial ones (mostly music DVDs)

Decrypting is not an isue- I use DVD Fab 6, but should I save the DVD as a VideoTS file or convert to ISO?

I have a number of programmes- Clone DVD; DVD fab 6, DVD Shrink, DVD decrypter, etc.

So two questions
1. In what format should I back up
2. With what programme?