You can crash your server – run out of memory, etc
As for more than one at once …I usually see 3-4 going simultaneously on my iOS client
February 07, 2020 at 07:59PM
via reddit https://www.reddit.com/r/NextCloud/comments/f0evbj/ios_app_upload_file_size_limits/fgul5qw?utm_source=ifttt