I must confess some confusion related to the space used by DTTG when syncing:
1)I had to reinstall DTTG on my iPhone because I was continually asked to redownload the databases, which had no effect. I decided to only sync the Global Inbox (18MB). This took over an hour, with the space used by DTTG rising to nearly 3GB in the process. Once it was done, however, it went down to 1.6GB. Still quite a lot for a few pdfs.
- I decided to reinstall DTTG on my iPad after the storage used rose to c. 260GB, which the system appeared unable to decide whether that space was taken up by by DTTG or the System. Here I synced the Global Inbox and one other database - the latter set to download on demand. It’s a very big database (125GB), but I was still surprised to see DTTG rise to 55GB. Now I’m downloading c. 40GB of files, and the Info panel in DTTG is saying I’ve got 34GB, and iOS is reporting 121GB used.
In both instances this seems like vastly more overhead, for a want of a better term, than on macOS - and it thus also takes a much longer time to sync than expected.