When you save and open files across a network or from removable media, many variables affect application performance. Therefore, some problems occur more frequently when you work across a network or from removable media than from a local hard disk. (Network-related problems include damaged files, denied access, or slow performance.) In these situations, Photoshop can return one of the following error messages:
- "Could not complete this operation because this file is in an unknown format."
- "Could not complete the request because the file is locked."
- "Could not save because of a disk error."