Dropbear SSH, a lightweight alternative to OpenSSH
I use an ad-free, open-source Android app called SimpleSSHD that implements a Dropbear SSH server. Being able to SSH into your phone and wirelessly perform an incremental rsync backup of all your photos and data is life-changing compared to the hell that is cables and the MTP protocol.Thank you to all these projects for delivering me from the clutches of MTP, I am indebted.