SSD Upgrade
MSI Thin 15 B12UCX SSD Upgrade
The short answer
Yes — the Thin 15 B12UCX has 2 M.2/2.5-inch slots.
Last verified 10/6/2026 · Sources: MSI, LaptopCompat (derived from processor and ports sources)
Specifications
- Storage slots
- 2
- Form factors
- M.2, 2.5-inch
- Interfaces
- PCIe, SATA
- PCIe generation
- Gen 4
What to buy
Buy a M.2 or 2.5-inch PCIe or SATA drive. The slot runs at up to PCIe Gen 4.
Conditions
- Replacement drives must match this laptop's supported form factor (M.2, 2.5-inch) and interface (PCIe, SATA).
Worth knowing before you buy
- A PCIe drive rated faster than Gen 4 will still work in this slot, but will run at the slot's Gen 4 speed rather than its rated maximum.
Want to improve multitasking too?
Sources
- MSI — Thin 15 B12UCX-1428TH Specification Sheet — verified 8/20/2026
- LaptopCompat (derived from processor and ports sources) — Estimated external displays for thin-15-b12ucx — verified 10/6/2026
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