Two portable hard drive card readers, backup while on the road.
Laptop, working files while on the road.
Copied on my return to home LAN ... has RAID-5 NAS, 3TB of working data.
Backup on a 1.5TB external drive, backup the RAW files only not jpegs.
Next backup will be another 1.5TB drive, and then probably have to move to 2TB.

I keep everything.
When I see some of the out of focus, blurry shots that get into print and on major websites - I review my images and find I've got some just like that ... only my name's not Darren Heath.