How long should it take to upgrade MyBookWorld firmware?

And how can I tell if it’s actually working?

Pretty certain (after 90 mins.) it’s either done or not worked (but I’ve done Automatic and Manual), but firmware version not changed???

OK, now have MWB connected direct to iMac - auto firmware update failed - reverted to manual uopdate - downloaded wdhxnc-01.02.14.img - all looked OK 'til browser screen (to MWB) went blank - lights moving up/down occasionally - now been waiting 45 minutes for job to complete - HELP???