Hi! What kind of SSD am I able to plug into the extra slot visible on the picture?

I've recently bought a "SSD M.2 PCIe NVMe 2242 1 TB Transcend MTS400S PCIe NVMe 3.0 x4" 
but it seems it is not compatible with that port 


https://photos.app.goo.gl/swDWSYhqdFMHjExr6

Welcome to the community forum.

Lenovo's specs say that it should be compatible.

System has one HDD slot or one M.2 2280 slot exclusively for storage
Some: HDD / SATA 6.0Gb/s, 2.5" wide, 7mm high, Active Protection System
Some: SSD / SATA 6.0Gb/s, 2.5" wide, 7mm high (e.g. xxxGB SSD)
Some: M.2 SSD / PCIe NVMe, PCIe 3.0 x 2, 16Gb/s
Some: 128GB M.2 SSD / PCIe NVMe, PCIe 3.0 x 2, 16Gb/s, in WWAN slot as 2nd Storage, mutually exclusive with WWAN

Lenovo's 128GB maximum reflects the largest size they tested when the model was introduced. There should be no reason why a larger drive won't work.

However see this Reddit discussion and especially the table at the end. The T480 and L480 are the same generation so the information should apply,

Assuming it can be placed with a sticker facing the board, there is one extra pin left on the longer side of the SSD port

I guess I could apply more force here, but I think it is not recommended? 

I would suggest not forcing things out but rather checking if you have the correct fit on the m.2 SSD cage.

HMM: https://download.lenovo.com/pccbbs/mobiles_pdf/l580_hmm_en.pdf

Parts replacement video: https://support.lenovo.com/us/en/solutions/HT511737

Jwes_Lenovo

I also bought the same Transcend drive and it doesn't work either. I put it in the slot but the laptop doesn't work. Have you installed yours?

You can check the list of compatible storage for your machine here: https://support.lenovo.com/partslookup?cid=all:apps:hxatlt

Provide the serial number or the MTM(Ex: 20YQ0005AD) and filter the commodity type and the country for options.

Jwes_Lenovo

The parts registry doesn't mention anything applicable to the mentioned slot, unless I fail to identify what "commodity type" is that
Also the page with video tutorials also doesn't have anything related to that slot 😢

Using a sample MTM I was able to get a list of compatible SSD's for your machine type:

The "commodity type" refers to the type of part you're looking for, such as "storage" for SSDs. If you're unable to find the information you need, I recommend reaching out to our sales team in your region: https://www.lenovo.com/pl/pl/contact/

Regards

Jwes_Lenovo

Hi,

It seems this Lenovo model has M.2 B-key slot, while your SSD has M-key, thus is not compatible with your laptop. I'm not an expert but got the same Lenovo model and the same idea to expand SSD capacity and after some research I came to above conclusion.

Regards