>>849017considering we're talking 100 gigs you'll most likely have to pay a monthly fee if you go server provider route.
you could always get cold storage, like, buy another external drive to store the data you have in your current drive and just keep it disconnected and safe in your residence.
for checking drive health,
https://crystalmark.info/en/software/crystaldiskinfo/ &
http://www.hdtune.com/ (cracked by the scene, so if you want it i can upload for you)