Files with THUMBDATA4–1763508120 are associated with Android mobile operating system developed by Google. THUMBDATA4–1763508120 files store index of photo files stored on a mobile device.

The main purpose of THUMBDATA4–1763508120 file is to make rendering of photos by the device, be it a smartphone or tablet, which were saved by the Gallery app. THUMBDATA4–1763508120 files also index images stored on external microSD attached to the device.