The corruption chances of the external drive increase if used on both Mac and PC systems regularly.Like FAT32, ex-FAT is not a commonly used file system, due to which its support may vary among third-party devices.Therefore, it is better to choose ex-FAT instead. Due to the limitation of FAT32, it might affect Mac’s and PC’s performance.Ex-FAT supports a maximum volume size of up to 1 Petabytesyte and maximum file size of 16 Exabytes. FAT32 supports a maximum volume of up to 8 Terabytes and a maximum file size of up to 4 Gigabytes.

Check this before selecting a file format.

Specific third-party systems, like Digital Camcorders and Sony PlayStation, need the drives to be formatted in either FAT32 or ex-FAT format to perform read and write operations.

Format your Western Digital My Passport external hard drive to FAT32 or ex-FAT format to transfer the data between a Mac and Windows system conveniently.

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How to reformat my passport for mac