I want to do this to avoid uploading & downloading large numbers of pictures that haven’t changed between importing the project and synchronizing it back, by cable. The ‘attachment directories’ section of the QField tab for Project Configuration can be made to produce a sister directory to the project export folder called something like ‘Photos’, by putting ‘../Photos’ in it, but I haven’t managed to get QField to put pictures there, even if it is copied as a sister folder to the QField project folder (all inside …/Android/data/ch.opengis.qfield).
The idea being that for synchronization and then re-export to the phone, the copying of the attachment folders would be told to ignore files with the same name that are already present.
Imported from GitHub discussion by @AveryAndrews on 2022-12-07T10:33:26Z