230S TS128GMSA230S 128GB is an SSD type hard drive which can fit 128 GB of data. This model has a mSATA form factor.
From Amazon
Transcend MSA230S 128 GB SATA III 6 Gb/s mSATA Internal Solid State Drive (SSD) 3D TLC NAND (TS128GMSA230S)
Conrad Electronic
Transcend MSA230S 128 GB Internal mSATA SSD mSATA Retail TS128GMSA230S
Clove Technology
Transcend mSATA SSD 230S 128GB