Help me come up with a backup solution
(1) continuously running Win10 PC (drives upgradable)
(1) Synology DS216 Play with 2x4TB drives [this is installed in a fireproof safe with its own UPS]
(1) Netgear ReadyNAS DUO with 2x1TB drives (this device is limited to about 1GB HDD or so I believe)
(1) external (USB) drive for the PC which I think has a 4TB drive in it
Generally I keep important financial documents (tax records, statements, etc) on the PC and back up "periodically" to the Synology (manually). I keep bulk stuff on the Synology alone (family photos, music, videos mostly). The ReadyNAS has some stuff on it that's just mirrored on the Synology.
Honestly the ReadyNAS has been flaky over the years and I don't trust it nearly as much as I do the Synology.
I've been thinking about getting a Crashplan-type service - but note I have a LOT of data, like 1TB+ (mostly the photos).
Anyway, can someone suggest a method (including software) to back up the lot of this in some sort of automated fashion (e.g. once a week)? Would it be best to have the PC host all of the data (add internal drive), then use the NAS's as dual backups, and the USB as a less frequent backup? What is good software (even if paid) for this?