ES File explorer to me is one of the best free file manager available in Google Play. Along with other bunch of features it also help us make apk backups of installed apps and games.
Downloading Google Play apps or games on each factory reset or format is always not possible, cause it needs a better 3G or WiFi.So making the apk backups of installed apps will help you to install those apps later without Google Play or any other Android app store.
Backingup Android Installed Apps and Games using ES File Explorer
1. Install ES File Explorer from Google Play
2.Open your ES File Explorer tap on “Fast Access” icon (at the top left) or options soft key.
3.Now tap on “App Manager” from the swipe menu.
4. In user app list,long press on the app or game you wish to backup as apk.
5.Finally tap on “Backup” in the bottom menu.
To get your backed up apk files browse to /sdcard/backups/apps/.