It appears your account has fully used it’s inode allocation, you will need to delete files to reduce inodes before the script installer will work, or upgrade to premium hosting where we offer over 400,000 inodes !
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I’ve recently downloaded a staging plugin and set up a staging website, which I thought was the problem, but I deleted the files associated with it (I think). Is there a way to see what files I should delete to clear up Inodes storage?
Welcome. Note that the inode counter resets once every 24 hours. If you deleted files, the change will be reflected when the counter refreshes. You can view the inode count on the right-hand side of the control panel.
Not really. You or your website created or uploaded those files. The only way to figure out what to remove is to go through the folders yourself and decide what’s still being used, and how important they are. We cannot tell that (automatically) for you.