Widows mapped drive says MYCloud is full

I have just installed a new 2TB drive in my MyCloud ex ultra. I have formatted the drives and wen I log in I have 3.81tb free(2x2TB drives). I mapped the drive (Win10Pro) but when I check space windows says only 1.87gb free. I would be grateful for any ideas
thanks

Go to your device dashboard, find the user used to map that drive, and check if you set a quota for them.

Be careful. I have 2x 4TB in Raid 0. I went over 3.9 tb of files on the system and the whole thing collapsed and the drive was not accessible on windows or dashboard. It took over a month to get a replacement device as a solution. Now the 2nd device is telling me I am full when I have only 4TB of files.
Makes sure you backup everything on the device
there is something wrong with the wd RAID system