Hi,
This answer is an automatic translation, so there may be grammatical errors or miswording.
This usually happens due to file name restrictions, unsupported characters, or blocked file types in OneDrive.
Try these quick checks:
Ensure no files have special characters like * : ? < > | or very long names.
Check if any files are larger than OneDrive’s upload limit 250 GB per file.
Temporarily disable antivirus or firewall if they interfere with uploads.
If the folder contains shortcuts or system files, remove them before uploading.
I hope this helps!