There are a number of reasons why the hard drive, flash drive or SSD might not be showing up. It may have been formatted incorrectly, it may be corrupted, it may have a faulty or inadequate cable, or there could be something else. If you run though the following steps you should hopefully be able to identify the cause and fix the problem.
To unmount your drive you can right-click control-click on the icon on the Desktop or in the Finder and choose Eject. Apparently most drive issues are caused when the disk is removed without ejecting it properly. Decided there is no hope for your faulty hard drive, we have a round up of some of the best we've seen here: The best Mac hard drives. Normally, Windows does this automatically, but sometimes because of other connected devices, your external hard drive will be recognized, but not have any drive letter assigned to it.
Pick a letter for your drive and you should be good to go.
On Macs, the drive should automatically appear on the desktop. If not, go to Disk Utility and check to see if it appears under the heading External. If the drive is showing here, but not on the OS X desktop, then click First Aid to try and repair the drive. If the drive is not showing up in Disk Management or Disk Utility at all, you have some other type of problem.
Scroll down to the Not Showing Up section below. You can get Windows to do it, but you have to purchase third-party software. The only other option is to format the hard drive and use the FAT32 format for the best compatibility.
If you see this message, it just means that Windows does not recognize the file system on the drive. Make sure you connect the drive to the appropriate operating system and backup any data that you might need before performing a format. The legacy format that is most compatible is FAT32, but it limits you to only 4 GB for max file size. You can read my previous post on how to format an external hard drive using FAT If you need support for bigger files, then you should use the exFAT format.
If you connect the drive to the computer and nothing happens, one of several things could be going on: your hard drive might have a problem, the correct software or drivers are not installed on your system, or there is something not working properly with the operating system. Sometimes old drivers can cause a device to malfunction when connected to Windows.
You can try fixing this by first going to the command prompt Start and type in CMD and running the following command:. Expand out Portable Devices , right-click on any items that are grayed out and choose Uninstall. Restart your computer and try to connect the hard drive again.
miicephoresa.tk In addition to Portable Devices, you can expand out Disk Drives and try to uninstall the device from there if it is not showing up properly in Windows Explorer. If you are connecting to a USB hub, disconnect that and try to connect the drive directly to the computer. The only way you can really tell if the problem is with the computer or the hard drive at this point is to connect the drive to another computer.