If users still ignore our forum rules and post again portal`s by name and url`s, the thread will be closed, postings deleted and user/s banned.
This is not a support forum for provider/portal related issues! Pleas follow the forum rules.
You can open the Z8 file explorer app to see if the storage device is supported/connected if you can see/open files, or if it is empty the Z8 should display the amount of free space. (Home screen > Settings > Storage > Removable storage)
It is recommended to always use the USB port on the right side, it's the "blue" one, because it's 3.0.
I recommend to use NTFS as filesystem type.
Sometimes it is required to use Windows "diskmgmt.msc" (or the Mac/Linux equivalent) to first create a disk partition before you can create a volume on the usb drive. To keep things simple make sure the partition and the volume are both 100% of the drive.