How to rename SSD (not partition) from untitled

Hello

I bought a second-hand Macbook Pro, it's the early 2015 model, 13" with 128GB SSD but 16GB ram. When I booted up it seemed that it was all set back (software wise) to how it was brand new from Apple. But when I opened Disk Utility, the SSD and the partition were both called untitled which I am finding very annoying.

See this picture I found on the web: http://switchtoamac.com/guides/images/disk_utility_02.png. Where it says 200.05 GB FUJITSU etc. mine says "untitled" and where it says Macintosh HD mine said "untitled". I managed to rename the partition but cannot change the top bit. My understanding is that the SSD should be called something like the model of the SSD (Samsung I believe), with the partition then being whatever I want it to be called.

I spoke with Apple on web chat and they said doing internet recovery would sort this out, but grateful for any comments before I go and spend hours doing that!

Thanks,

Olly