Yes I do, offline and offsite backup of important and valuable data stored on a HDD at my parents. Not the most seemless or user friendly options, but the privacy and security of my data is more important.

I have also considered looking into mirroring my data on a trusted hosting provider for some day when I can afford to pay.

Yeah, that's a good strategy I suppose even if you do need to cart around a HDD to update every so often. You just need to make sure your parents backup is updated periodically.

The carting around and updating is made simpler with a tool I have found and love, free file sync. One of the few tools I buy into (even though its free).

Checking it out now.

A NAS with offsite backups to S3/Glacier/C2 works fine