Backblaze had been recommended by several photo mags and photographers as when relying upon several external hard drives your still liable to losing digital images if they get corrupted or damage while leaving them indoors.
I recently lost one folder (150 raw files) from a corrupt hard drive and thankfully purchased a two year subscription to Backblaze before Xmas and did not expect to call upon a restore so quickly.
Following a lengthy initial download stream of all digitals over a period of two weeks (overnight and automatically configured) the software just backs up all my hard drives each night for about an hour.
It's worth a free trial period on maybe one hard drive initially to test its quality and support
Current USD Price is under $4.00 per month if purchasing a two year subscription
https://secure.backblaze.com/buy.htmBarrie