Yes, you can install 2 SSDs. I just purchased a Dell XPS 15 9510 in Feb 2022, configured with the Dell 1 TB SSD option. I then purchased a Samsung 980 Pro 1 TB SSD (PCIe 4.0 NVMe M.2) and installed it in the second slot. It works and now appears as my drive, but only after a lot of work and experimentation. When I first booted the laptop after installation it did not recognize the 2nd drive. I contacted tech support, read the documentation, explored the BIOS settings and had no luck. Then I noticed that Dell had installed my primary OEM C: drive in what the documentation shows as being slot 2. I was told that made no difference, but I swapped the two, putting the OEM drive back in slot 1 and the new Samsung drive in slot 2. Once booted, the XPS 15 recognized BOTH drives, but the Disk Management app was showing the Samsung drive as Drive 0 and the OEM drive as Drive 1. Again, I was told it didn't matter, but I swapped the drives again and found that the XPS 15 now showed the OEM C: drive as Drive 0 and the Samsung as Drive 1. Success! There's one more step that you have to go through in the Disk Management app to properly configure the volume for the Samsung as the drive. You need to right-click on the Drive 1 in the Disk Management app of Windows, click on New Simple Volume option, go through the wizard and assign it to D and give it a volume name. It's shown in this YouTube video: [URL] In addition to all of this, you'll need a special set of tools and a heat sink, which are described in this video: [URL] Getting the bottom cover off of an XPS 15 is not easy the first time you try it. Be careful! Be careful too when you buy the heat sink. Because of the swapping described above, I ordered the wrong one first and had to reorder. You would think that you'd order the one for Slot 2 but I had to order the one for Slot 1 as Dell had used Slot 2 for the OEM drive. So the one for Slot 1 is what I needed: [URL] All in all, this was a very frustrating and time-consuming experience. I let Dell know that I was very unhappy that they didn't offer a second SSD as an option upon purchase, and that I had to go through all this for a simple upgrade. I was perfectly willing to pay whatever it cost to get the computer I wanted, and this turned into a very poor buying experience. Be careful to that they don't lead you down the path to applying for Dell credit for a small discount, unless you really want that. I'm now experiencing the "joy" of Windows 11. All I tried to do was to download an FTP app that I use and either Windows 11 or Edge or some security setting kept me from even doing the download. It required that I assign this to Edge, so now when I click on the downloadable exe file, it opens Edge and does nothing. Have fun!
I was going to buy an XPS 15 9510, but I'm getting conflicting information from Dell on whether I can install a 2nd SSD. One sales agent told me (via chat) that you can install 2 SSDs.  Another told me you can only have 1 SSD (because the 2nd M.2 slot is used by the wireless module).  They told me that a design change to the battery meant the wireless module had to be moved. But the service manual clearly shows 2 SSDs and gives instructions on how to add / remove them:[URL] Can anyone confirm if new 9510s can have 2x SSDs, or only 1?
Can the 9510 have 2x SSDs?