Question Will a MS-16GC Version REV:0.B Laptop support a SATAIII HDD?

[Philbilly64]

I am wanting to upgrade my mechanical HDD.

 

[USAFRet]

I am wanting to upgrade my mechanical HDD.

almost certainly, yes.

A 2.5" format SATA III SSD will be a drop in replacement for the HDD in it now.

 

[Philbilly64]

almost certainly, yes.

A 2.5" format SATA III SSD will be a drop in replacement for the HDD in it now.

Even though the specs only state SATA, not SATA 2 or 3

 

[USAFRet]

Even though the specs only state SATA, not SATA 2 or 3

Yes.
SATA is forwards and backwards compatible.

It is likely that port is "SATA III".
They just didn't choose to state the "III".