Do you want to move some of your important file from your Mac computer to an external hard drive ? If you became unable to move files to external drive Mac and finding the easy solution for this problem then you have come to the correct post. Well, this post will let you know that what is the reason behind this problem and what to do in this situation. It is informed you that if your Mac computer is getting infected with the malevolent program and then this will make the all stored data corrupted or inaccessible. Thus you will became unable to move files to external drive Mac. Sometimes this could happen due to the malfunctioning of the software applications. In order to move the files if you doesn't connected the hard drive with the Mac computer in a proper way then this will also make you unable to move files to external drive Mac. Before moving the any file, make sure the external hard drive is properly connected. Due to this problem you may lost the data from your Mac computer. If you use the Mac data recovery software then you can easily recover the lost files and in a very quick time.