How do I find temporary files on Android?

On Android, open the Photos app, tap the three-lined menu at the top left, and go to Device folders > Screenshots to see what’s there.

Can I delete tmp files in phone?

If unable to access the app, temporary internet files can also be cleared by doing a force stop and clear data of the Chrome™ app. However, using that method results in all settings/preferences (e.g., browser bookmarks) being cleared on your Android™ device.