What is the use of Thumbdata in Android?

A folder with a . THUMBNAILS extension is a hidden folder stored in the sdcard/DCIM directory on select Android devices. It contains one or more . thumbdata files that store properties about thumbnail images indexed by the Gallery app to load images quicker.

What is Thumbdata file in Android?

thumbdata is a system file, Android recreates it. … thumbnails folder, if you have reinstalled Android or similarly redid the system in some way. To keep Android from creating the 1GB file anew, we need to create a dummy file that fools Android.