HP Pavilion x360 SDD/HDD question

[Jdizz66]

My girlfriend is looking at buying a HP Pavilion x360 with a 128 GB M.2 Sata SSD. I know she'll need something larger for storage than that 128 GB. Can you put in a 2.5" hard drive or SSD using SATA 3 along with the M.2 SSD or do they occupy the same space and you can only use either or. Also is M.2 Sata faster than SATA 3 or are they the same? I know most 2.5" Sata 3 SSDs are cheaper in general.
Thank you!!

https://www.bestbuy.com/site/hp-pavilion-x360-2-in-1-14-touch-screen-laptop-intel-core-i5-8gb-memory-128gb-solid-state-drive-silk-gold-with-natural-silver/6082002.p?skuId=6082002

http://h10032.www1.hp.com/ctg/Manual/c05474219

 

[USAFRet]

http://store.hp.com/us/en/ConfigureView?catalogId=10051&langId=-1&storeId=10151&urlLangId=&catEntryId=1487152&quantity=1
Looking at hp.com, that x360 has space for a single drive.
Either 128GB or 256GB m.2, or a 500GB HDD in the cheaper package.



However...further investigation...
http://store.hp.com/us/en/ConfigureView?catalogId=10051&langId=-1&storeId=10151&urlLangId=&catEntryId=1760651&quantity=1

"500 GB 5400 rpm SATA; 128 GB SSD+$180.00"

So maybe both a HDD and the m.2.

Do NOT only go by what BestBuy sells.

 

[rgd1101]

https://support.hp.com/us-en/product/hp-pavilion-14m-ba100-x360-convertible-pc/16842288/model/18021534/document/c05792857
the 128GB ssd is m.2, get a sata ssd.