Ext4 is an open source file system and most linux distributions uses it. While NTFS and ReFS (improvement on NTFS according to Microsoft (yes i am a microsoft hater)) may fragment files and needs defrag regularly, ext4 allocates files in a more intelligent way and doesn't need any defrags at all. NTFS saves files close to the start of the disk and allocates buffer free space around files on the drive. Ext4 scatter different files all over the disk, leaving a large amount of free space between them. When a file is edited and needs to grow, there’s usually plenty of free space for the file to grow into. If fragmentation does occur, the file system will attempt to move the files around to reduce fragmentation in normal use, without the need for a defragmentation utility. Moreover ext4 has superior speed as well according to this reddit post. I think this need more testing. This channel did a lot of ssd testing for gaming, software opening times etc. but not one file system testing. We should force microsoft to use ext4 or develop something like it.
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