Notes about the ITHMB file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The ITHMB file type is primarily associated with 'iPod photo' by Apple Inc.. iPod photo displays 25 full-color thumbnails at a time. Images are displayed when a thumbnail is clicked on. Thumbnails are kept in a single file with this extension.