All files stored on your webspace will need to be related to your website, you will be unable to use it for general file storage.
There are many purpose-built online tools for this such as Dropbox, Google Drive and OneDrive.
We also do not advise backing your site up to your webspace, as this will very quickly use up your available storage space.
If you are using the following plugins, BackUpBuddy or UpdraftPlus, then please check out the articles below :
BackupBuddy - https://hub.lyricalhost.com/knowledgebase/126/How-to-back-up-your-website-safely-using-BackupBuddy.html
UpdraftPlus - https://hub.lyricalhost.com/knowledgebase/125/How-to-back-up-your-website-safely-using-Updraft-Plus.html
As part of your hosting package, we take daily backups of your site, but if you would like to manually create or restore a backup, details can be found in the following article :
Please raise a ticket if you've got any questions.