What Is Mft Free Space?

MFT stands for Master File Table, which is a crucial component of the NTFS file system used by the Windows operating system. MFT Free Space, on the other hand, refers to the unallocated space on the hard disk that is available for storing new files.

As files are created, modified, or deleted, space becomes used or available in the MFT. Unused space in the MFT is referred to as MFT Free Space. This space is reserved for new files that are created or uploaded onto the computer. Understanding MFT Free Space is essential for maintaining an efficient and organized file system, and ensuring that files are saved effectively and efficiently.

What is MFT Free Space?

MFT free space refers to the unallocated space on the Master File Table (MFT) of a file system. The MFT is a database used by the file system to store information about all the files and directories on a disk.

Here are some key points to help explain MFT free space:

– When a file is created, the file system will allocate a certain amount of space on the disk to store the file’s data. This space is typically divided into clusters or blocks, which are grouped together to form larger units (such as file extents).
– The MFT maintains a record of the location and size of each file’s storage blocks on the disk.
– When a file is deleted or moved, its blocks are marked as free in the MFT, but the data may still be present on the disk until it is overwritten by new data. This is why data recovery software can sometimes recover deleted files.
– The MFT also has its own allocation units, which are used to store the records of the files and directories in the file system. When a file or directory is created, modified, or deleted, the MFT records are updated accordingly.
– As the MFT grows and shrinks, it may leave behind unused clusters of storage space. This space can be used to store new files, but those files may become fragmented if the clusters are not contiguous.
– In some cases, the MFT free space can become fragmented or over-allocated, leading to performance issues or disk errors. This can be addressed by reorganizing the MFT, defragmenting the disk, or resizing the MFT.
– Not all file systems use an MFT; for example, the FAT (File Allocation Table) file system uses a different method for storing file information. However, the concept of free space allocation still applies.


1. What is MFT free space?
MFT (Master File Table) free space refers to the space on a hard drive that is available for new files to be stored. The MFT is a database on the hard drive that tracks the location of all files and folders.

2. How do I check for MFT free space on my hard drive?
You can check for MFT free space on your hard drive by opening the Disk Management tool on your computer. Right-click on the hard drive in question and select Properties. Under the General tab, you will see the amount of free space available, including the MFT free space.

3. Why is MFT free space important?
MFT free space is important for the proper functioning of your hard drive. Without enough free space, your computer may experience performance issues or even crash. It’s recommended to keep at least 15% of your hard drive capacity as free space.

4. Can MFT free space be defragmented?
Yes, MFT free space can be defragmented using disk defragmentation tools. Defragmenting the MFT free space can help improve the performance and speed of your hard drive.

5. Is it safe to delete MFT free space?
No, it is not safe to delete MFT free space as it contains important information about the location of files on your hard drive. Deleting MFT free space can result in data loss or corruption. It’s best to leave the MFT free space untouched and focus on freeing up space through other means.


In conclusion, understanding the concept of MFT free space is crucial in managing the storage space on a hard drive. It allows for efficient allocation of disk space and ensures that the hard drive is always running at optimal performance. By regularly checking and managing MFT free space, computer users can ensure that their data is safe and accessible at all times. So, take some time to check your MFT free space and optimize your hard drive for better performance and smoother operation.

Leave a Reply