If you are using helium then your data is stored on your phone but in hidden format and you cannot find location of those data using your phone before we continue further let’s discuss what is helium
What is Helium
Helium is the backup solution for Android dvices, It lets you backup your apps and data to your SD card or cloud storage. With Helium, you can sync app data from your other Android devices– even if they are not on the same network.
Helium Backup Location
If you are looking for helium backup app backups location then you can find this in phone / carbon / and you can find this only when Android smartphone is connected to the PC
This backup folder is not visible to the File Explorer “My Documents” of your Android smartphone. you need to copy this folder directly to the PC.