Couldn't access the drive after change of user account

I am using WD MyCloudEX2 Ultra. While trying to update the firmware to OS 5, for some reason it didn’t allow me to use existing login, then I created a new account.

Now the device is linked to the new account and all my files are gone in MyCloud. Also I am unable to access the drive in locally, said “G:\ is not accessible. The user name or password is incorrect”. Is there a way to link the device to my old account in order for me to retrieve all the files? Thanks!

You should try contacting WD’s Technical Support about this for live assistance and troubleshooting

To Contact WD for Technical Support

support.wdc.com