Samsung MU-PB1T0B User Manual - Page 7

File Formats X5 is pre-formatted in using exFAT file system which is supported by Windows OS and Mac OS. Whether data formatted to a certain format may be read or written to your computer vary depending on the OS, as specified in the table below. If you use X5 on a single OS, it is recommended that you format the X5 using the appropriate file format for that OS. (e.g.) Read/write restrictions for file systems by each operating system File Formats Windows OS Mac OS exFAT Both read and write Both read and write NTFS Both read and write Read only HFS Not recognizable Both read and write * When using exFAT across multiple operating systems, data writing may become locked and you may only be able to read data. If such problem occurs, you can restore write access by following the instructions below.  Mac OS: Connect X5 to your Mac again, and perform Eject.  Windows OS: When the notice pops up saying that write access is disabled, click "Scan and fix" to perform Check Disk (CHKDSK). If you did shut down the notice without performing Check Disk, you may do it by selecting the drive → Right-click → Properties → Tools → click Check. Capacity of X5 Displayed on the System The capacity reported by the system to which X5 is connected may differ from the labeled capacity, due to the difference between the decimal and binary systems of measurement and other factors including the drive's partitioning and blocking. * e.g.: Windows OS: 1 GB = 1024MB, Mac OS: 1GB = 1000MB Labeled capacity uses decimal system and is convertible as below: 1 GB=1,000,000,000 bytes, 1 TB=1,000,000,000,000 bytes Lower capacity may be demonstrated by your computer due to use of a different measurement standard. 4