The File Extensions Database

.THUMBDATA3--NUMBER File Extension

  • Developer by: Google Inc.
  • Category: Temporary Files

What is an .THUMBDATA3--NUMBER file?

.THUMBDATA3--NUMBER is Android MediaProvider thumbnail database

The thumbdata3--[various numbers] file extension is associated with Google Android OS.

The thumbdata3 files contain generated thumbnail database of pictures, found in DCIM folder mostly on SD card of Android phone. These files can be pretty large, but if you need you can freely delete them. If needed the app will recreate them again.

The numbers behind the file extension are probably generated randomly depending on the device or something else.

Example of these files includes:


How to open:

These files are not meant to be opened directly and only server for cache purpose. You can safely delete them if needed.

How to convert:

Conversion to other formats is not possible.

How to solve problems with THUMBDATA3--NUMBER files

  • Associate the THUMBDATA3--NUMBER file extension with the correct application. On :
    Windows: Right click on any THUMBDATA3--NUMBER file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.THUMBDATA3--NUMBER files". Mac: Right click (or Ctrl-click) the THUMBDATA3--NUMBER file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .THUMBDATA3--NUMBER is Android MediaProvider thumbnail database. Because only the current version supports the latest THUMBDATA3--NUMBER file format. Search, therefore, e.g. on the Google Inc. manufacturer website after an available .THUMBDATA3--NUMBER is Android MediaProvider thumbnail database update.
  • To make sure that your THUMBDATA3--NUMBER file is not corrupted or virus-infected, get the file again and scan it with antivirus software.