Creating a searchable digital library

I have a few hundred Beta tapes that i have been asked to both put them in an archive quality format, as well as create a digital archive for that other people could access fairly easily.

right now i have most of them digitized into ProRes 422 from a former project. they are approximately 12 to 14 GB a piece. would it be worth redigitizing them into a different format?

I was wondering where a good place to start looking for a long term storage solution for these would be. any help would be greatly appreciated.