Inspiron 15 7577 and Samsung 960 Evo NvMe SSD

[bacillus1]

your motherboard bios should have the win 10 licence key embedded in it so a clean install of the same version of win10 should be automatically activated.

[Clintlgm]

SSD there are 3 types 2.5 SATA the same as any other 9mm hard drive.

M.2  SATA Slot has two breaks

M.2 NVME Slot has on break    Some notebooks can use either SATA or NVME you'll find that information if you don't already know it. In your full Specification or your Service manual.

Brands don't matter it's one of these 3 standards. Brands do matter in quality and functionality, warranty, and lifespan.

Some older notebooks also have an mSATA slot mostly tablets and very low-end notebooks. Some older notebooks use mSATA for RAID set up to buffer a Hard Drive.