The usual storage available on a Realme Android 9.0(Pie) 64 GB variant is around 56 GB.
So, it can be said with surety that the Realme 5S would be having the same user storage as the rest of the Storage is taken by the operating system and apps.
Check Full Device Specifications Realme 5S
No, the Realme 5s doesn't come with earphones out of the box and it is not surprising as it is the general case for all the mobile devices these days.
The companies try to provide all the greater specifications to the mobile and thereby, they have to cut some price on earphones.
Check Full Device Specifications Realme 5s
Realme 5S was launched in India on 29 of November 2019.
It went on an online sale and will soon be coming back online for sale.
In the meantime,do not forget to find all the detailed specifications and other latest updates regarding Realme 5S here.