When you create, rename, upload, or save a file, it can return an error if the filename contains an invalid character or conflicts with an existing file.
Invalid characters or filenames
You cannot upload a file to the cloud if its name:
- Contains ASCII control characters
- Contains a forward slash (/)
- Uses a system-reserved name (. or ..)
- Uses the Tresorit-reserved name (.tresorit)
Conflicting filenames
If a file with the same name already exists in the cloud folder, it returns an error. Keep in mind:
- Filenames are case-insensitive: A.txt and a.txt are treated as the same file.
- Unicode normalization applies: Filenames that differ visually but normalize to the same Unicode NFD form are treated as identical.