There are two main types: internal fragmentation , where allocated memory has unused space, and external fragmentation , where free memory is scattered. Reducing fragmentation helps improve the efficient use of memory and system performance. Fragmentation reduces the disk performance and slows it down considerably. Here is how to defragment disk in Windows 10 and Windows 11. Learn all about memory fragmentation in operating systems, including the key differences between internal vs. external fragmentation and how to solve the issue. Fragmentation in asexual reproduction explained with steps, examples, and a diagram. Learn how it occurs in plants and animals.