When you first set up your PlayStation 4, you were given a few options to choose from when it comes to storage. You could either choose to install the PlayStation 4’s internal storage, or you could choose to use an external drive. If you chose the external drive, then you were given the option of choosing how much space your drive would take up on your PlayStation 4. You could also choose to have your drive formatted as FAT32 or NTFS. If you chose FAT32, then your PlayStation 4 would use that format for its internal storage. If you chose NTFS, then your PlayStation 4 would use the Windows NT File System for its internal storage. If you decide that you want to use an external drive for your PlayStation 4 storage, then there are a few things that you need to do in order to make sure that the drive is compatible with your PlayStation 4. First and foremost, make sure that the drive is compatible with both the PS4 and Windows 10. Next, make sure that the Drive is at least 8GB in size. Finally, be sure to check whether or not the Drive has any software installed on it that will help manage and protect your data when using an external harddrive for Playstation4 storage.