How much storage does your phone need?
And remember, some of this will already be used up by the system software.
External, or expandable, memory refers to a removable microSD card or similar.

Sean Gallup / Getty Images
Many devices which feature a MicroSD card slot are sold with a card already inserted.
This could be 10, 20 or even 50GB.
So should that phone be sold as an 8GB gear?
Reputable sellers should have no problem telling you these details.
You candelete pre-installed apps on Androidto free up space.
FAQ
How much storage your smartphone needsdepends on how you use your phone.
Both are important, but the amount of RAM largely determines how fast your phone is.