For ACDSee to identify between new and previously imported files, it requires a unique identifier, such as a disk serial ID. The "Import from Device" command may not always function effectively to import new files due to the absence of such a unique identifier for some devices, resulting in inconsistencies across sessions

We recommend the following workarounds when importing the new files:

- For cameras, use a card reader with its memory card and select the "Import from Disk" command
- For USB-connected external drives and thumb drives, choose the "Import from Disk" command
- For smartphones (Android and iOS), use the ACDSee Mobile Sync App.