wd external hard drive mac cannot format not enough space

exFAT works on both macOS and Windows, and it doesn’t have the 4 GB file-size limit that FAT32 does, so you’ll be able to back up movies and other large files. If you need to transfer files between Mac and Windows computers, exFAT (extended File Allocation Table) is the best option, although it doesn’t work with File History or Time Machine.If you’re using an SSD, there is a newer format called APFS (Apple File System), which is intended for built-in drives and external SSDs for newer Macs.(Check the product listing to confirm the drive will be labeled as an HDD or SSD.) If you plan to use an external hard drive (HDD), which costs less than an external solid-state drive (SSD) for more storage capacity but has the downside of slower transfer times and a far less durable design, you should use HFS+ (Hierarchical File System Plus, also called macOS Extended Journaled). Typically, if an external drive is physically larger than a deck or cards or has more than 2 TB of storage, it’s an HDD.macOS and Linux computers, however, can only read files stored on such a drive they cannot write to an NTFS-formatted drive. NTFS is native to Windows, and most hard drives are preformatted for this file system. If you plan to use your drive for File History backups on a Windows computer, and you use only Windows, stick to NTFS (New Technology File System).So how do those five file systems differ, and which one is right for you? Non-Linux computers can use five main file systems: NTFS, HFS+, APFS, exFAT, and FAT32. If you use a Mac, the likelihood that you’ll have to reformat the drive is higher.

But if you buy a drive secondhand or if you plan to switch between operating systems, you may still need to reformat it for use on Windows.

If you buy an external drive-such as one of our recommended portable or desktop hard drives, portable solid-state drives, or USB 3.0 flash drives-you may need to reformat it to work with your operating system of choice, since different operating systems use different file systems to process data.Īlthough it’s true that any drive is compatible with both Windows and macOS once it’s formatted properly, most drives come preformatted for Windows out of the box.

Wd external hard drive mac cannot format not enough space