Bought used 5s. How do I prove it is 16/32/64gig?

In Settings > General >About it will tell you. It also should be on the back of the phone.

Pete

Not meaning to be a pain, but mine doesn't say anything about capacity on the back of the device.

ChrisJ4203 wrote:

Not meaning to be a pain, but mine doesn't say anything about capacity on the back of the device.

Not being a pain at all. Maybe I'm thinking of my old iPod Classic. I get very teary when I reminisce about the death of Old Faithful. 😢

Anyhow, the other method first mentioned should do it, but thanks for the correction.

Cheers

Pete

Go to Settings > General > About and scroll to the point where it says 'Capacity'. Or you can connect your phone to iTunes to check.

I agree with the first part about going into Settings, and I understand about a Classic. I had one, a 160GB, handed it down to my son, and it was stolen out of his vehicle in my own driveway! Caught the thieves, a group of juveniles, but the Classic was gone.