Copy file exceeds maximum upload size
Copy-from-public treats the source like a new upload. If that file is bigger than your tier’s max upload size, the copy is refused.
Why this happens
The server compares the source file size to the effective cap for the member’s billing tier (ul2_max_up_mb_* under Users & limits, plus any per-user override). The message includes the cap in human units (for example 100 MB).
Diagnose and fix
1. Note the size shown in the error and the size of the public file.
2. Admin → Settings → Users & limits → Max upload file size for that tier (ul2_max_up_mb_reg / _prem / _prem_pro). Raise it if the business allows it.
3. Or have the member upgrade to a tier with a higher cap (the UI may already offer an upgrade cue).
4. Or pick a smaller public file to copy.
5. Hard site ceiling: Settings → Mods → Absolute upload hard cap (upload_hard_cap_gb) can still block oversized copies even when the tier looks high enough.