Go to this link it includes all steps needed to scan to flash drive.
For login: default credentials are admin / 1111
If 1111 does not work use serial number (case sensitive)
Here is the link to where the System Administrator and User Guides can be downloaded, the latest Firmware can be accessed and the latest drivers.
Easiest scanning option supported if the device is not networked would be Scan to USB. Please review the resources available.
I hope this helps.