*I think that you guys may have tried to backup an app with a higher size than 50 Megabytes, you may have noticed that you will get an .apk file that is lower than 50 Megabytes even if this app consumes 1 gigabyte of your device storage!
*The reason of this is that Google Play store doesn't allow developers to upload an .apk file >50 Megabytes, so for the apps that is higher, they have to develop additional files with .obb extension to store all of the remaining data then upload it to the store!
Let's get into the easy steps to backup the required app:
#Head to the following directory in your mobile: /sdcard/Android/obb
#You will find a folder named as following in general: com."developer name"."app name" with no spaces.
#Locate the file of the chosen app then open it you will find an .obb files/file.
#Copy all the files you can see to your computer or any safe place, you may copy the whole folder.
#Get any app that could backup your installed apps into an .apk file, for example ES File Explorer which is available on Google Play.
#Backup the required app and you're done.
#All you have to do now when you are ready to restore the app is to create a folder in obb folder with the same name format and put the files you copied from there before, or simply copy the whole folder again.
#Install the .apk file you have created ordinarily, and open the app while you have an Internet connection just to verify the setup.
Now your app is ready again to be used exactly like the old days!
Tell me if this was useful and if I have said something wrong.
Sent from Egypt!!