Syncthing.

App on the phone and host on the server.

But syncthing deletes images when they are deleted on the phone right? I just tried it, and this is what seems to happen. Is there a way to set it up such that I can delete things on my phone, but they won’t be deleted on the server?

docs.syncthing.net/users/config.html# Adjust the config settings:

Type

Controls how the folder is handled by Syncthing. Possible values are:

sendreceive The folder is in default mode. Sending local and accepting remote changes. Note that this type was previously called “readwrite” which is deprecated but still accepted in incoming configs.

sendonly The folder is in “send only” mode – it will not be modified by Syncthing on this device. Note that this type was previously called “readonly” which is deprecated but still accepted in incoming configs.

receiveonly The folder is in “receive only” mode – it will not propagate changes to other devices.

receiveencrypted Must be used on untrusted devices, where the data cannot be decrypted because no folder password was entered. See Untrusted (Encrypted) Devices.

Yeah, I have the folder on the phone on sendonly. But this sends also deletions to the server, apparently.