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2. What does "free up disk space" mean — and how do you fix it?

   www.aol.com/lifestyle/does-free-disk-space-mean...

   Use the Disk Cleanup function on Windows. Windows has a built-in feature that helps you free up disk space; it’s called Disk Cleanup. Just click the Start button and then search for it by name.

3. Free-space bitmap - Wikipedia

   en.wikipedia.org/wiki/Free-space_bitmap

   A separate array then stores the number of free sectors in each chunk, so chunks with insufficient space can be easily skipped over, and the total amount of free space is easier to compute. Finding free space now entails searching the summary array first, then searching the associated bitmap chunk for the exact sectors available. [1]

4. Scratch space - Wikipedia

   en.wikipedia.org/wiki/Scratch_space

   Scratch space is space on the hard disk drive that is dedicated for storage of temporary user data, by analogy of "scratch paper." [1] [2] It is unreliable by intention and has no backup. Scratch disks may occasionally be set to erase all data at regular intervals so that the disk space is left free for future use.

5. Disk Cleanup - Wikipedia

   en.wikipedia.org/wiki/Disk_Cleanup

   Disk Cleanup (cleanmgr.exe) is a computer maintenance utility included in Microsoft Windows designed to free up disk space. It was introduced in Windows 98 and has been a part of Microsoft Windows ever since.

6. Defragmentation - Wikipedia

   en.wikipedia.org/wiki/Defragmentation

   Defragmentation is the operation of moving file extents (physical allocation blocks) so they eventually merge, preferably into one. Doing so usually requires at least two copy operations: one to move the blocks into some free scratch space on the disk so more movement can happen, and another to finally move the blocks into their intended place.

7. File size - Wikipedia

   en.wikipedia.org/wiki/File_size

   File size is a measure of how much data a computer file contains or how much storage space it is allocated. Typically, file size is expressed in units based on byte. A large value is often expressed with a metric prefix (as in megabyte and gigabyte) or a binary prefix (as in mebibyte and gibibyte). [1]