If the file's actual size is more than a cluster, the file will take up two or more clusters. This is to say, if the file's actual size is smaller than the size of a cluster, it will still take up a cluster. One cluster can only hold one file, but one file may take up multiple clusters depending on the file size and the cluster size. What Allocation Unit Size Should I Use for exFAT?Īs mentioned before, cluster size represents the smallest amount of disk space that can be used to hold a file.
And before changing cluster size for your partition, you can check out the following contents to learn what the best allocation unit size is or what allocation unit size should you use for exFAT. So it is very necessary to change cluster size reasonably. If the allocation unit size is not set properly, it may reduce the data read-write speed and waste a lot of disk space. And some users don't even notice the allocation unit size option.Īctually, the allocation unit size or cluster size can influence your disk performance or disk space utilization.
So they just use the default value for the allocation unit size. And usually, the allocation unit size will be set as Default, as many people don't know what it is and how to set it. When you create or format a partition, you can set the allocation unit size for the partition.
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