If you are backing up from a mobile phone to a computer, please ensure that the mobile assistant on the computer side is the latest version, and then ensure that the default storage location for backup is the computer hard disk with enough space. If the above operations can't be solved, you can try to clear the memory of your mobile phone and follow the following steps:

Open Huawei's own mobile phone housekeeper APP；;

Enter the mobile phone housekeeper and click Clean to accelerate;

After the mobile phone is scanned and cleaned, you can also click Space Management in the figure below;

After entering the space management, you can choose the corresponding cleaning project, which can greatly clean up the memory of the mobile phone.