with termux on android and an openvpn tunnel to my own stuff, it's quite fast and effective to use rsync to mirror the entire contents of the DCIM folder and other folders where images are stored. I just have to remember to run the backup job periodically, which I could almost certainly automate if I really put more time into it.
when I'm on the same LAN as my backup destination and on a 802.11ac 2x2 80 MHz channel AP, it's shockingly fast, whatever is the max real world speed of my wireless connection, somewhere around 40-50MB per second to do the sync.
when I'm on the same LAN as my backup destination and on a 802.11ac 2x2 80 MHz channel AP, it's shockingly fast, whatever is the max real world speed of my wireless connection, somewhere around 40-50MB per second to do the sync.