SFCACHE File - opening and understanding

Did your computer fail to open a SFCACHE file? We explain what they are used for and recommend software that we know can open or otherwise handle your .SFCACHE files.

What is a SFCACHE file?

Files that contain the .sfcache file extension are created by the ReadyBoost feature that is included with the Windows Vista operating system.

Vista's ReadyBoost feature allows a user to plug a USB flash device into a USB port as a cache or virtual memory drive. This allows for faster caching and enhances the performance of a user's computer and reduces the problems that are commonly associated with limited computer memory.

The SFCACHE files are the cache files that are written to the added drive by the ReadyBoost application. SFCACHE files are active files, so they should not be disturbed when running on a system.

How to open SFCACHE files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension SFCACHE for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 2 different SFCACHE openers which you will find listed below.

Suggest another file format using extension SFCACHE

While we know of one file format using the .SFCACHE file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .SFCACHE file.

Various viewers for this file format

These apps are known to open certain types of SFCACHE files. Remember, different programs may use SFCACHE files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Optimizer ProOptimizer ProUser submitted
Smart Fast PCSmart Fast PCUser submitted
We have not verified any software that we know for certain will work with SFCACHE-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with SFCACHE-files. If you know one, please use the 'Suggest a program' link below and tell us about it!