It is a little wide/big for Alienware m15 r5. You'll have to do a little mod/tweak to get it there. Conduct at your own risk.
Solid State Drive Goldenfir 128GB SATA T650-128gb
24 Review
Kingston A400 240GB SATA SA400S37/240G solid state drive
60 Review
ADATA SU800 256GB SSD: High Speed Read & Write, 3D-NAND, SATA III, 560MB/s & 520MB/s
27 Review
πΎ SAMSUNG 970 EVO SSD 1TB - M.2 NVMe Interface Internal Solid State Drive with V-NAND Technology, Black/Red
33 Review
Game console Microsoft Xbox One X 1000 GB HDD, black
53 Review
π Seagate Expansion 3TB Portable USB 3.0 External Hard Drive (STEA3000400) in Black
60 Review
Shock-Resistant Transcend StoreJet 25M3 USB 3.1 Slim Portable Hard Drive with 500GB Capacity
99 Review
8TB Seagate Backup Plus Hub Desktop Hard Drive with Data Recovery Services
56 Review