On a Dell, Windows 10 Home cannot create partition on SanDisk SSD Plus 120GB

So it seems I didn’t complete everything. After I got the “We couldn’t extend the selected partition. [Error 0x8007045d].” I had just left it alone to come to this forum and submit this thread.

Later, I clicked ok and then using the Windows installer, I deleted the 450.0MB partition. Then the ssd again had 111.8GB unallocated space. Using the Windows installer, I selected that space and clicked NEW. It gave me a message about Windows possibly creating more than one partition for the system to work, and then almost instantly it is done and then I have this
Drive 0 Partition 1: Recovery Total Size 450.0MB Free Space 436.0MB Type: Recovery
Drive 0 Partition 2 Total Size 100.0MB Free Space 95.0MB Type: System
Drive 0 Partition 3 Total Size 16.0MB Free Space 16.0MB Type: MSR (Reserved)
Drive 0 Partition 4 Total Size 111.2GB Free Space 111.2GB Type: Primary

So what’s going on? 

What’s causing these issues?