I have just bought a Lenovo IdeaPad L340 with Windows 10. I want to install Ubuntu 18.04 as a dual boot and no, the question is not about how to achieve that 
It’s about the partition size. So far there are 2:
I’s also like to leve DATA for installation files, like games and such.
Thanks!

It’s about the partition size. So far there are 2:
- Windows (C:\), 199 GB, 136 free
- Data (D:\), 276 GB, 276 free
I’s also like to leve DATA for installation files, like games and such.
Thanks!