I believe this is because your username on this computer cannot be written to your home directory (some like) ..
Try opening the search box and "get information" in your home folder. (from finder, Cmd-N opens a window, right-click on the left folder, which is your username, that is, your home folder, and select βGet Information.β Right-clicking may not work if it doesnβt work, use ctrl -Click.)
In the Get Info dialog box below, you'll see the Sharing and Permissions section, you may need to rotate the triangle by clicking on it. In the list, make sure that your username has read and write attributes, if not, you need to add them by logging in as an administrator and changing them.

This photo is for reference only, but you can see that justin (me) has "Read and Write", this is what you need in your home directory.
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