MyCloud folder not syncing on macbook

Hello, hopefully I’m posting in the right place.

I have a WD MyCloud device which I purchased last year and I had it set up with my macbook.
I haven’t used the device for a while but I need to back up some important files and clear up storage space on my macbook.

I originally had a MyCloud folder set up on the sidebar in the “finder” on my macbook. Now when I am moving files across to the folder from my usual “documents” folder the sync doesn’t work. The files are in the MyCloud folder but if I log in to access my files online, they are not there.

Please could anyone help to advise what I may be doing wrong.
I’m really worried about losing some of these files, photos etc from my macbook (as this happened last year and is the reason I bought the device so I could back everything up)

Thanks!

It may be better if you clarify what utility you are using to backup/sync files between Mac and MyCloud.

Also, if you are using a sync tool, be aware that sync and backup are different functions. Depending on your need, you may want to use a backup tool, rather than a sync tool. Of course, you may be using ‘sync’ in a more general meaning (i.e. ‘copied to’)…

Also be aware that if you really are moving files to the MyCloud, you will only have one copy (on the MyCloud), therefore you are vulnerable to device failure. If you want to have a safe backup, you need to copy files to the MyCloud, or, if you do move them from Mac to MyCloud, perform a backup of the MyCloud.