Do all android devices have the folder “sdcard”?

Question

I'm creating an application that saves a file inside /mnt/sdcard/.myapp

The folder "/mnt/sdcard" exists on Nexus 5 and G3, does it exist on all devices?

Answer 1

I'm creating an application that saves a file inside /mnt/sdcard/.myapp

Please use getExternalFilesDir() for a location unique for your app. Do not clutter up the user's external storage root.

The folder "/mnt/sdcard" exists on Nexus 5 and G3, does it exist on all devices?

Not necessarily. If you must work off of the root of external storage, please use Environment.getExternalStorageDirectory() to get it.