![]() The files will take about 1.6 GB disk space (the minimum space: 50000*32). ![]() Assuming that there are 50000 files inside your disk. Here we take the 32 KB cluster size (FAT 32 file system) for example. Besides, the size on disk also depends on the cluster size of your file system. So, this situation often occurs when there are a large number of small files. When the wasted drive space adds up to a certain level, it is very likely that the size on disk is greatly larger than the actual size. If it is, the discrepancy will be much bigger because every single file will waste drive space. When it comes to the size on disk vs size huge difference, you can check if there are lots of small files inside the folder and the cluster size is relatively large. The file system of your drive can set different cluster size, which affects the size on disk. When using a Windows PC, the operating system will allocate disk space for each file in clusters or allocation units. Why There Is Big Difference Between Size VS Size on DiskĪs you might know, a hard disk is made up of the Tracks and Sectors. What happened here? Please keep reading on the following part. However, many users reported that there is a huge difference between size and size on disk. Generally speaking, there is no big difference between the size on disk vs size. Since the file is compressed, the size on disk would often be smaller substantially. It may occur when you use the automatic file compression feature provided by your operating system. The size on disk can be the same as or smaller than the actual size. Well, you may encounter some exceptions as well. Now, you may have known why the size on disk is always slightly bigger than the actual size of a file. The amount of wasted space for each file will not surpass the cluster size that you set for a file system. If you save the 1 KB file in a file system with 32KB clusters, the file will take up 32 KB disk space. For instance, if you save a 1 KB file in a file system with 2 KB clusters, the size on disk will take up 2 KB. No matter how small each actual file size, the file that is written to the hard drive will occupy a discrete number of clusters. ![]() Usually, common cluster sizes can range from 512 Bytes to 64 KB (NTFS file system). ![]() For example, the maximum file size that FAT32 file system supports is 4,294,967,295 bytes. The maximum file size that a file system can support is not only decided by the capacity of the file system, but also by the number of bits reserved for the file size information. To reduce the number of addresses that are being used by the files, the file system will treat a number of bytes as a single cluster. So, what affects the file size on disk? In fact, it depends on the way that your file system stores the file on the hard drive. Read More What Affects the File Size on Disk That is why you find there is a difference between size and size on disk. When a file is written to the file system of a modern storage device, it may take up slightly more disk space than the actual file size. The size on disk indicates the number of bytes that the file actually takes up on the hard disk drive. The numbers inside the red box are the actual file size. The file size measures how much data a file contains on the storage device. The values indicate the actual size and the actual number of bytes in the file. When opening the properties of a file, folder, or drive, you will find the values of the size and bytes. So, this section will explain the definition of size and size on disk separately. To figure out the size vs size on disk huge difference, you need to understand their own concept. What does mean “Size” and “Size on disk” for a file? I’ve read a post just like this that has been solved but I didn’t get my answer. I was looking on properties of a file and saw two little bit confusing things that make me confused. For example, a user from SuperUser reported that size on disk is always lager than size. They want to know why there is such a huge difference between size and size on disk. Some people reported this question on forums or communities. However, a great many people still notice there is a big difference between size and size on disk when opening the properties of a file or folder. Most of the time, the values between size and size on disk are very close. How to Narrow the Size VS Size on Disk Huge Difference.Why There Is Big Difference Between Size VS Size on Disk.Do you know why? How to narrow the size vs size on disk huge difference? If you are also searching for the answers, this post of MiniTool is your best choice. You may find the difference between size and size on disk.
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