PR4100 lost connect and could not creat/delete folders

[ThangDinhX]

Hi,
I am using My Cloud PR4100, OS5, fw 5.11.112 ( newest)

This device oftens encounter “Offline Driver” and can not create or delete folders.
Also, since upgrade OS3 to OS5, I have not been able to move files between level 1 folders.

Help me, thanks!