Was trying to get some space on my iPhone and I noticed that Nexcloud documents and data was almost 3Gb (per iOS storage screen). I’ve already cleared the cache from within the app. How can I tell what’s taking up the space?
You probably already solved this but, this helped me to reduce the app size from several GB to 77 MB (Each of the following steps reduced the app size):
Clear cache (More > Settings > Advanced > Clear cache (close to the bottom) > Restart device – last likely not necessary)
(steps from this helpful NC forum link: Nextcloud taking up a huge amount of space on iphone - #2 by Andreww)
Then tried: More > Settings > Advanced > Clear Log file > close app (had to scroll)