Android devices offer different storage places, and for some we have special tags:
- device storage: usually referred to as "internal storage" or "phone storage". If your issue is solely about this, please use the internal-storage instead. On your device, this will be used for apps and data, and usually is mounted at
/data. If you get an insufficient-memory (or "storage low") error, it refers to this partition only.
- system storage: also referred to as "ROM". This part is mounted read-only at
/system, and holds the Android core system as well as most of the pre-installed apps (see also: bloatware)
- internal SDCard: some devices offer a separate internal SDCard, where you can store your own data (such as documents, videos, music files, pictures, etc.). For questions/issues with this, please use the internal-sd tag.
- external SDCard: most devices offer a slot to place a microSD card into. If your question is solely related to this storage, rather use the external-sd tag.
Then there's the ram, of course -- but we don't count that as "storage", as you cannot permanently store data there (and you even don't want to do so, because one never can have enough RAM :)
- insufficient-memory: See "device storage" above. Use this tag when your question is about an "insufficient memory" (or "storage low") error.
- internal-storage: See "device storage" above.
- app2sd: about moving parts of your apps (which support this) from the device storage to the SDCard to free up space
- link2sd: an approach similar to App2SD
- usb-storage: other mass media attached to your Android device, usually using the usb-host-mode/usb-on-the-go
- usb-mass-storage: a way to access your device's storage from a computer
- mtp: also used to access your device's storage from a computer