You may want to stay away from the Nexus 5X 16 GB
The user memory that's available on any new smartphone is never equal to the advertised internal memory: a 16 GB handset won't really offer 16 GB of usable storage space, and the same goes for devices with 32 GB, 64 GB, or 128 GB of internal memory. Of course, many customers already know this, but those who are buying a smartphone for the first time may be unpleasantly surprised by this fact.
While the Nexus 5 16 GB from 2013 had 12.5 GB of free user memory, things are worse with the Nexus 5X 16 GB, which offers only 10.6 GB of free user memory out of the box. Since the handset does not feature microSD card support, the low internal memory can quickly become a problem, especially for those who are planning to install many apps and games.
In case you're wondering, the Nexus 5X 32 GB offers about 24 GB of free user memory out of the box - that's more than double the amount of free space you're getting on a 5X 16 GB. So it's obvious that the 32 GB variant of the handset is a better buy. If you're not yet sure you want to buy the smartphone, check out our Nexus 5X review for a detailed look at it and its features.