For example, telling them to copy the Documents and Pictures folders and pasting them on an external drive is a no-go, as it would take many hours every time. Telling them to copy only new files to the drive seems error-prone and annoying, and I additionally don't think I could explain that to my grandma. Leaving the drive permanently connected isn't really an option with laptops, and is a cryptolocker risk (I wouldn't be surprised if they click on a cryptolocker sooner or later). Not to mention the risk of fire.
If there is good software, an external drive is a reasonable compromise and a cheap option. The software I found for local backups typically requires more than a single click, and many hard-code the drive letter (which is variable). I also found that my mom plugged in the backup drive exactly zero times over the course of half a year.
For online backup, I would like it to be properly encrypted (I'll manage the key: if I get hit by a bus, they still have the original data). Trying Backblaze, the backup gets stuck on a random picture. Asking support, they say it might be a read lock, which is plausible, but c'mon, Windows and indefinite read locks exist since forever, it should not break the backup completely. I guess I'll implement support's solution (ask mom to reboot) and pay for a month while continuing to monitor it...
Cygwin and rsync (or restic or so) is possible, but requires me to run a server with ~500GB of free space. Scripting it so they only have to click an icon isn't a big deal, but rolling my own seems error-prone, and surely there exists a solution that someone without a unix neck beard can understand?!
What do you use for your loved ones?
I chose Acronis b/c I had installed a local version years ago on his old PC and it ran flawlessly. When I updated to the new version of Acronis it found the old backup files with no problems. The software just works.
Whenever I visit I check his local backup drive status. Sometimes the USB drive light is turned off and I remind him to keep it on and check again before leaving (it immediately initiates a delayed backup). He gets emails notifying him when Acronis remote backups are completed.
Hope that's enough!8-))
I'm an old-fashioned UNIX/Linux text-based person, so my storage requirements are satisfied by a relatively small USB drive. Everything I need backed up is on the desktop. Backup takes only a few minutes. Vita brevis, carpe diem.
* No Installation.
* Cross-Platform (iDevice, Mac, PC, Linux).
* Encrypted.
* Simple enough for any person to use without handholding.