I normally do not respond to these types o requests, BUT you did say "My DVD" collection.
See:
http/lifehacker.com/380702/five-best-dvd-ripping-tools
I've been using AnyDVD HD for quite some time, But is expensive.
The favority seems to be Handbreak.
I've been converting my DVDs to smaller Mpeg4 files to store on my 64 Gig Thumbdrive for Playback on my Asus tablet and My Samsung laptop. Using AVS Video converter 8, Not a freebee, which condenses the size town to a 2 -> 4 gig file (Does DVD and Bluray) and I can typically put around 20 movies on my 64 gig thumbdrive (also back up to a 2.5" HDD).