 Windows 7 removes this limitation, enabling ReadyBoost caches larger than 4 GiB.Windows 10 only allows formatting exFAT on volumes sized 32 GiB or larger with the default user interface, and FAT32 format is suggested for lower sizes; command-line utilities still accept a full range of file systems and allocation unit sizes.The standard exFAT implementation is not journaled and only uses a single file allocation table and free space map.