Thx fr your reply Bartman. Would you pls explain the difference between ripping and backing up as you suggest?
Either a huge difference, or none depending on how you define 'ripping'. I commonly see 'ripping' used in the context of compressing the data as it is copied off of the disk (such as 'rip to MP3'). If your goal is 'highest quality' then you don't want any transcoding of the content from the compressed version on the disk to another differently compressed version, you want a bit-perfect copy of what is on the original media. The two easiest ways I know to get that are either MakeMKV or AnyDVD. AnyDVD will either create an .iso or copy your data to your drive in the same folder structure on the disk. MakeMKV will either backup your media (same as AnyDVD copy to disk), or repackage it to an MKV keeping the full original quality.
JRiver Media Center can handle a folder structure copy/backup/rip - so space no issue that would be my first choice.
If space is minor concern, use MakeMKV to pull out just the parts you care about to MKV files - stripping out languages, audio tracks, foreign subtitles, ads, previews, special features, etc. that you don't want.
It looks like DVD Fab also copies the data in original quality, but I really know nothing about that tool. Just don't pick any options that 'compress' the data, stick to the 1:1 quality functions.