not enough space on macbook pro after factory reset
I am having trouble re-installing the operating system on my macbook pro. I erased the disk and performed essentially a "factory reset" as per all the instructions provided by the Apple Support guide. When I turn it back on and press command + R and try to reinstall it says there is not enough space.... It's a 250GB macbook pro and the operating system needs 50GB. I don't understand why there isn't enough space, It says of the 250GB there is only 48GB free despite the fact that erased the drive. Can anyone shed any light on how to fix this?
MacBook Pro 13″, macOS 11.1