How can a Mac not copy files to a USB flash drive

In our daily life, we often need to save some copies of the USB stick. However, some users who use Macs sometimes encounter situations where they cannot be copied. Today we will introduce you how Mac can't copy files to a USB flash drive, and what we should do in the face of this situation.

Why can't a Mac copy files to a USB stick? Small series for everyone summed up the following several possibilities:

One, the U disk is locked

1. Problems that arise

Figure one: File is locked

Open the Mac, insert a USB flash drive, want to copy the file, but show that the file is locked, can not make any changes, delete, modify can not be implemented, obviously is just used the U disk, replace the computer but can not use, really annoyed to not.

2. Cause analysis

Figure two: USB flash drive for read-only status

Select USB drive, right-click-Display information, found that the USB drive is now out of read-only state, so you can neither copy files, can not modify files, only view files.

3. Solution

Figure Three: Open Interface

Open the NTFS for Mac interface and discover that the "Turn off Paragon NTFS for Mac" option was turned off? OS x driver, will tick off, do not turn off the driver, click on the settings to start, and refresh the interface, the following interface will appear. If it does not appear, the USB drive is unplugged and then inserted, and the following interface appears.

Figure four: USB flash drive Detected

When you select the USB flash drive again, right click to select "Show Information", you can see that the USB stick has been restored, can read and write functions.

Figure V: Return to normal USB drive

Second, unable to detect U disk

1. Cause analysis

1) USB stick not fully plugged into the computer

The USB stick is not well inserted into the computer, so it cannot be opened, and it is not possible to copy files.

2) USB Stick Damage

The USB flash drive is detected, but there is still no way to copy the file, and a few KB of the file is one or two hours, and so the transfer is completed but cannot be opened.

2. Solution

1) u disk is not plugged in.

Just plug the USB stick back in.

2) USB Stick Damage

Disk Utility

Figure VI: Disk Utility

The USB stick is damaged, you can open the Mac target bar and select "Go"-"utilities"-"Disk Utility".

Disk Utility Settings

Figure 7: Disk Utility settings

Open Disk Utility, select the USB flash drive to be modified, select "Repair Disk" first, if no effect, you can select "Verify Disk", if the test is also to repair, follow the system automatically sent by the repair instructions to operate, in the installation of the permissions problems encountered in the "Repair Disk permissions" can download the installation. After repair, if not, it is recommended to replace the U disk.

The above is why Mac can not copy files to the USB drive reason analysis and solution, want to learn to use the NTFS Mac to partition the USB drive, you can go to the NTFS for Mac official website of the use of skills to watch learning.

A similar problem that occurs when using your Mac is: What if your Mac can't read an external hard drive?

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How can a Mac not copy files to a USB flash drive