![]() But if you want to place so many small files on that disk, consider using a smaller cluster size. Usually it's best to keep what the OS suggests you. The solution is to re-format your disk choosing a smaller cluster size. To check your current cluster size, in windows: press win+ r, type cmd, and then write into the console: wmic volume get driveletter,blocksize In other words,every single one of your 10KiB files on the disk occupies 1024KiB! That's why your disk is filling up so fast, your files are occupying one hundred times more space than needed! That's how 9GiB become 900GiB! In other words, a file system's cluster size is the smallest amount of space a file can take up on a computer.Įvery file on a disk needs to start at a new cluster, so 245.000 files will occupy at least 245'000 clusters, while any file bigger than your cluster size will occupy more than one cluster: A file which has 1025 KiB will occupy TWO clusters of 1024 KiB! 1024KiBĪ cluster, or allocation unit, is a group of sectors that make up the smallest unit of disk allocation for a file within a file system. ![]() However, on the disk they appear blown up to 240GiB, which is indicated as "Size on disk". ![]() (1 KiB is 1 kibibyte, which is 1024 bytes. Specifications Models 1TB: (WDBJBS0010BSL) 2TB: (WDBCGL0020BSL) 3TB: (WDBCGL0030BSL) System Compatibility Reformattable for Windows OS X Mac OS X Lion or Mountain Lion, Mavericks and Yosemite Interface USB 3.0 (5Gb/s) USB 2.0 (480Mb/s) Dimensions (H x D x W): 4.33in x 0.62in x 3.21in (110mm x 15. ![]() As you can see in your image, you have 245,646 files which have a total size (= actual data) of 2.65 GB (or rather, GiB).Įach of theses files on average is approximately 10KiB big.
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