Have MyCloud EX2. Copying folder to it from laptop no problem. Copying from laptop to nas hangs. Have nas folder and laptop folder open on screen. If I click in nas folder, 1 file is transferred. Then hangs again. Can repeat this many times, but always hangs. Disable MacAfee and Malwarebytes did not help.
Mistake. Copy from nas to laptop hangs. That is: one direction not problem, other does not work.
You may want to search through the dedicated EX2 subforum to see if anyone else had a similar issue. This subforum (My Cloud) is generally for the single bay/single drive My Cloud units.
That said, what operating system is the laptop using adn how are you copying the files (using what program/application)? If it happens ONLY on one computer that indicates a specific problem with that one computer.
Windows 10. Using copy/paste. Dragging, Copy/Paste, and crl+c/ctrl+v all fail. Same problem with other computer.
On both units I tried occasionally unexpected network error 0x8007003B pops up. Clicking Try again starts copying, that grinds to a halt, but can re-start by clicking anywhere in the source folder. One or a few files are copied. Then stops again.