SFCACHE File Documentation

Overview

Feature Value
File Extension .sfcache
Full Name ReadyBoost Cache File
Developed By Microsoft Corporation
Type of Format Disk Cache File
Primarily Associated With Microsoft Windows ReadyBoost
File Signature (Hex) 0xE1
File System Integration NTFS, FAT32, exFAT
Usage Speeding up system performance
Operating System Windows Vista, Windows 7, Windows 8, Windows 10
Encryption Supported
Maximum Supported Size Up to 256 GB per device
Compression Implemented
Partition Type Primary
Reusability Yes
File Location %windir%prefetchReadyBoost.sfcache
Backup Not necessary (cache file)
Editable No
Deletion Safe to delete (will reset cache)
Recovery Generally not needed
Accessibility Through Windows Disk Management
Specific Tools for Management Windows Performance Monitor, ReadyBoost tab