Question about Dell AA615520

Hello WinfriedM799 The SSD you have selected fits. However, there are cheaper ones you don't necessarily have to take Dell.
Here for 126 CHF / 1000 GB Samsung 970 EVO Plus (1000 GB, M.2 2280)
or 2000 GB Samsung 970 EVO Plus (2000 GB, M.2 2280)
It is important for you to know what kind of SSD it is. Is it an M.2 M Key or M.2 B Key, in most cases the M.2 M Key is built in.

in my Dell Latitude 5500 Intel(R) Core(TM) i5-8265U runs great