SETTING UP READYBOOST
When you insert a drive to be used for ReadyBoost you should see
Or you might elect to use Explorer and select a drive as shown below. Then click Properties as shown
With any reasonably modern drive, especially a USB thumb drive, as long as there is enough free space, users should never see this message. It is possible to encounter this with older SD cards.
Note the recommendation text at the bottom.
We currently do NOT know of a viewer for this file. It is encrypted using Advanced Encryption Standard 128 (AES-128). It has been claimed that this encryption (which saves space and masks what might be confidential data) can be turned off by manipulating a registry value IF the Ready Boost drive is internal and non-removable. We did try to read the sfcache file with Notepad++ . We are currently not motivated to write a viewer because it is unclear what benefit knowledge of the contents of the dynamic data in the sfcache file could be to a human user.