A thumbindex file extension is related to the Motorola Media Finder and used for its thumbnail indexes.
THUMBINDEX file extension - Motorola Media Finder thumbnail index
What is thumbindex file? How to open thumbindex files?
File type specification:
The thumbindex file extension is associated with the Motorola Media Finder.
Media Finder is application for Motorola mobile phones with Motorola proprietary operating system as well as is installed on some Motorola smart phones with Android operating system.
The thumbindex file is for internal purposes of Media Finder and contains index of image thumbnails stored on SD Card.
This thumbindex file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.