When a user copies 10 .pdf files from one teams site to another teams site the user gets an error which do not defines informatiion about the error. (just an error message).
Sometimes 4 from the 10 files are copied the other time 2 from the 10, the size of the 10 .pdf files is around 30 MB
Even client as webbased the problem occurs. Even changing the team sites doesn't have a positive effect.
See the screenshot below 6 from the 8 files are being copied