USAFRet :
oscar.w873 :
umm how much does windows 10 take up?
Irrelevant.
For a 150GB drive, leave it as one partition.
For a new UEFI board, you want GPT.
I certainly agree with both your comments although I would condition the "one partition" by leaving 10% unallocated (since he has a Samsung drive) and Magician will use that as additional space for overprovisioning. Just FYI, I am using about 150GB on my boot/program 512GB 950 Pro - I have numerous applications installed (including Windows 10 IP 17063, Office 2016 and Adobe Creative Cloud (all resources hogs) and many others, but NOT a single game - so I'm an anomaly, I guess - but that will give you an idea how quickly you will suck out free drive space.