My wife's XPS 14 laptop came with a 32GB mSATA drive that was supposed to work with Intel Rapid Storage to cache the spinning 500GB drive, but it was factory and despite Hours of troubleshooting I was never able to get Intel software to speed up a spinning hard drive. Luckily, the price of SSDs has come down enough that it's economical to replace the built-in 32GB drive with this 128GB drive. I junked the 500GB drive and cloned it to a 128GB mSATA, changed the boot order in the BIOS and everything worked like a champ. Windows 8.1 starts now and wakes up in a reasonable time! With a 500GB drive for laptop storage, most people don't need a drive larger than 128GB. You can use symlinks (google it) to put large, rarely used files and folders on a spinning drive, but make them look like they're on an OS SSD.
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