You need to go open up a RAH flight kit. When you see it you make sure you lift with the legs lol.

I hear ya! We're waiting on our EFB's to be delivered later this month. By putting them onboard, we can take off almost 100lbs of paper charts and other manuals that we can replace with electronic versions (at 3 lbs per each EFB).

Eagle issues charts customeized for the airplane. ie ATR plates are FLA & Carrib. SAAB, Cali & Tex.
The EMJ kit has plates from Miami to Mexico, San Diego to St John, NB. Eagle issues plastic binders. Three 2" binders for the EMB kit. I find them stiff and difficult to use, so I put all the NE airports I regularly fly to in a standard Jepp 2" leather binder. The rest of the plates get jammed in 2 of Eagles' crappy binders, and only get touched when there's an update. (But get schlepped along for the next time I get reassigned to do ORD, DFW, or LAX flying). Technically, FOs are only required to carry M-Z plates, and thier current sequence, (CA's carry A-L).

Yeah, I'm with Josh, I can't imagine any regionals carrying all the Jepps. You couldn't even get all of them into the cockpit! We use to carry a full set when I flew King Airs and we had to keep them back in the rear cargo area because of the weight and sheer volume of them.
I am glad to have moved on from prop flying though. Now my enroutes and plates all fit into 1 neat binder :D.

What are the backup requirements for EFBs?

Just two independent sources. That can either be one EFB with paper backup, or two EFB's. Could also use an MFD displaying charts as long as it is supplied by two servers (I would think you'd also need another reversionary display but I'm not sure about that one).

When I flew Hercs overseas...it was three flt kits full of charts...remember each kit had three of everything. One was for US stuff..the other two had the rest of the world. As a new co-pilot I was PUBS officer for a few months.. Jesus H. Christ it was a pain making sure all the bags were current, and had everything they needed. 48 freaking bags... ( 16 assigned aircraft )... good thing was it was NOS charts so for the plates the whole books changed out.

Yeah if that was Jepps I think I would just swallow a greenade :D. That sounds like a terrible job.