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How to copy files from Mac to USB

The main cause of this problem is that macOS can only read files formatted as NTFS, but cannot write files to NTFS drives. Therefore, if your USB drive is NTFS format, the copy and paste process cannot be performed. Therefore, the USB drive needs to be FAT or ExFAT format. However, ExFAT is more stable.

Steps to change USB drive format:

Open Finder in your system, then choose Applications> Utilities> Disk Utility . 

How to copy files from Mac to USB Picture 1

Select the USB drive on the left side.

How to copy files from Mac to USB Picture 2

Then click the Erase button in the top right corner of the screen. Select ExFAT in the format drop-down list and start reformatting the drive.

How to copy files from Mac to USB Picture 3

After the drive format is complete, you can copy files from macOS to USB normally.

How to copy files from macOS to a USB drive using the command line

Open a Terminal window and run the following command:

cp -R Documents /usb

-R will copy all the subfolders in the Documents folder to the USB external hard drive.

However the above command may give an error message like:

usb/Pics: No such file or directory.

This is because the USB external hard drive is mounted in the / Volumes folder, so you should add the / Volumes directory before the name of the USB disk when you run the cp command.

cp -R Documents /Volumes/usb-name
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