However, if you intend to use the blue cart, play DS cartridges, or make use of the VC of GBA/DS games, then you will need two MicroSD cards in order to maintain re-installation of the exploit. Most exFat uses 128KB allocation size by default and its different from HDD's, most external flash memory devices always use a bigger cluster size, now the HDD being for huge amounts of data the higher you chose, the more space you will lose with thousands of files being even smaller than the cluster size. But PS4 only supports two of these file systems—FAT32 and exFAT. This will eventually enhance the system’s performance. Allocation units are the same thing as clusters, and each file on your hard drive takes up a certain number of these clusters depending on the file size. Besides, the hard drive with only FAT32 or exFAT file system can be used in PS3 and PS4. What is allocation unit size, or AUS, I hear you asking. exFAT vs FAT32 for PS4. I tweak the hell out of everything, this is one of those things which is not worth the bother. You may wonder why so many devices need FAT32 format to read. If I remember correctly the backup file is just 1 large file once completed, so it might go faster with a bigger allocation unit size at the format. Click Win+R and type compmgmt.msc to run Disk Management. This will help in saving disk space. exFAT vs FAT32. Once the exploit is installed, take the card out, reformat it into exFAT with a small allocation size, put your ROMs on it, then put it in the red cart. However the way the various hardware units and the OS buffer the data can mean an omtimal size needs to be selected. I suppose I could try that one to see if the problems are the same. But, if the size of the files is large, it is a good idea to keep the allocation size big. So when I reformat to exFAT, I typically pick 256 kilobytes for the Allocation unit size. Next, you can choose FAT32 or exFAT as the file system. Our Hard drives are divided into clusters and the size of the allocation unit determine the size of a single cluster. PS4 Best allocation unit size for exFAT drive. There might be some differences with FAT32 / exFAT and also the amount of allocation unit sizes. I'm wondering if I use a big allocation unit size (AUS) while formatting my HDD for my backups will help in any way. Right-click on USB partition, then select Format. I reformatted the drive using exFat but this time raised the allocation unit size from 4096 kilobytes to 8192 kilobytes and again...same issues. FAT32 was first introduced by Microsoft in 1996 and as a pretty old file system it supports a large amount of internal/external medium, such as XBOX, PS3/PS4, and Android etc. Yea.. FAT32 is an older file system that’s largely relegated to USB flash drives and other external drives. The best solution is to get one of the free drive testing software apps and test the setup with a number of different allocation unit sizes. These aren’t the same!!! I have one other flash drive and it is the exact same model, even the same size of 64GB. 1 kilobyte = 1000 bytes (or 1024 bytes depending on context). I might do a benchmark test later on to test this. Whether you’re formatting an internal drive, external drive, USB flash drive, or SD card, Windows will give you the choice of NTFS, FAT32, and exFAT. level 1. Leave it at default or let the PS4 handle it. In addition to formatting USB to exFAT or FAT32 via Windows Explorer, some of you might prefer using Windows Disk Management to fix PS4 won't recognize USB issue. Whether you’re formatting an internal drive, external drive, USB flash drive, or SD card, Windows will give you the choice of NTFS, FAT32, and exFAT. Allocation unit size makes zero real world difference in general usage, it is really a hole not worth diving down. First, a lot of people confuse the default NTFS file size of 4096 bytes with the exFAT option of 4096 kilobytes. 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