Hi nimerali

Kindly share the system service tag through the private note, we will be glad to assist you.

Welcome to the Dell Community  @nimerali 

Yes you can add an M.2 SSD.

Dell Latitude 5501 compatible upgrades:

https://www.crucial.com/usa/en/compatible-upgrade-for/Dell/latitude-5501

Dell Latitude 5501 Service Manual:

https://www.dell.com/support/manuals/us/en/04/latitude-15-5501-laptop/latitiude_5501_sm/removing-the-ssd?guid=guid-b992d3d6-14ed-4ad4-88a4-9f4dfe2a6d9c&lang=en-us

Best regards,

U2

NOTE: 

@DELL-Cares with all your "vast" experience and resources  your reply is to request a Service Tag via PM???

What a waste of time and money!!!

Thank you very much for replying  , I intend to buy this model ,
and upgrade the memory to be 32 GB plus (512 ssd+512 ssd) of storage
I am concerned about the possibility of "CPU overheating"
 ... I hope I am wrong  about overheating and the laptop is performing at its best

Your very welcome @nimerali 

So far I have not seen any posts concerning overheating for this model.

But then again it is a newer model???

Let us know if you need any further assistance.

Regards,

U2

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@nimerali wrote:

Hello

I have two questions regarding this model : 5501 ( i7-9850H )

- originally it comes with 512 GB SSd , can I add also M.2 512 SSD ???

I intend to buy this model ,
and upgrade the memory to be 32 GB plus (512 ssd+512 ssd) of storage
thank you .

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I have this laptop, and no you cannot do this.  There's:  (A) 1x  M2 slot, and (B) 1x enclosure for a 2.5" SATA drive.  If you bought the Latitude 5501 with the 512GB SSD, note that is sold with an M2 SSD, so your M2 slot on the motherboard would already be used up and there's no room for a second M2 SSD.  You can replace it with a 1TB M2 NVME PCiE SSD, however, for the same result.  

There is one version of the Latitude sold with a 500GB (not 512GB) spinner (HDD), and that model will have one open M2 slot.  My owner's manual actually says the Latitude 5501 only supports 1 drive (either SATA or M2 NVME). I strongly suspect this is a typo and should say Dell has only validated this system using one of these configurations, and that you'd be fine self-installing both an M2 drive + 2.5" drive. 

But to answer your question, if you purchase this with the 512GB drive, that is an M2 drive, and no, you cannot install two M2 drives on this laptop. 

From the owner's manual, must be a typo (should say you can install one 2.5" + one m2), but fyi: 

"Storage
Your computer supports one of the following configurations:
• 2.5-inch 5400rpm hard-disk drive
• 2.5 inch 7200rpm Hard-drive drive
• M.2 2230 solid-state drive
• M.2 2280 solid-state drive"

@nimerali  I just got this a couple days ago, so can't really speak to thermals, but if helpful, I can say that my complaint so far about this model is the CPU fan is loud and large.  It shoots out a steady stream of heat from under the left hand side of the keyboard when in use. I assume that's a necessary inconvenience to address thermals..

Hi

I have this laptop and the CPU will randomly get hot like A LOT i often come to the computer fans spinning full throttle with a "boot device not found" then trying to boot from LAN error then I have to go into the bios and select the nvme SSD as a primary boot device

These are the temperatures I have right now :

I hope Dell releases a bios update soon that fixes this issue

Best regards

My 5501 is also very hot, to the point of making my left hand very uncomfortable.