The most effective way to make sure that your data remains safe at all times is to back it up. While the Windows Operating System now provides a variety of different ways that can be used to back the data on a computer up, there is nothing quite like physically backing up all valuable data to an external hard drive. People quite commonly back the data they value up to external hard drives, but this process sometimes does not go their way. One such instance is when the user is faced with error 0x80004001 while trying to back data up to an external hard drive.
Error 0x80004001 is accompanied by an error message that states there is not enough free space on the external hard drive to back the data up. In most instances in which this error appears, that really is the case and the only solution the user has is to either get another external hard drive which they can back their data up to or free up storage space on the same external hard drive. However, in the event that you are completely certain that the external hard drive has enough free storage space but are still greeted with error 0x80004001, the culprit behind the error may be file system issue. If that is the case, all you need to do to get rid of the issue is to run the CHKDSK utility on your external hard drive, and this utility will search for any system file errors and fix any that are found. To do so, you need to:
Open the Start Menu.
Search for cmd.
Right-click on the search result titled cmd and click on Run as administrator.
Type chkdsk /f E: into the elevated Command Prompt, replacing E with the alphabetical letter designated to your external hard drive by your computer (F – for example). Press the Enter key to execute the command.
Wait for the CHKDSK utility to successfully find and fix any and all system file errors on your external hard drive. Once the utility has worked its magic, you should no longer get error 0x80004001 when trying to back data up to your external hard disk.