Here's my experience today. I have been having the dreaded "Other" storage bug, where it and the "Apps" keps growing and growing, slowly, and also in great jumps for no good reason. As we know, MS is working on a fix in the next OS update. But on Thursday my "Other" instantly jumped up from 4 to 9GB and used up all my free space. I deleted all that I could and limped along on a half a Gig of free space until the work week was done and then I decided a Hard Reset was in order.
I backed up as much as I could on my laptop, and via the backup functions on the phone, then took the plunge.
I rabidly got to the spinning gears logo and connected the phone to the mains and waited. After a half hour I tried to soft reset it with no effect. I did several more over the next hour, also with no effect.
I began to despair, but decided to let it alone. The Gears kept spinning for nearly 2 1/2 hours!, then it happy proceeded to boot up. The firmware and OS were the latest versions and it was ready to start automatically load all my Apps. The system also was ready to open up all my email and Outlook accounts, all I needed was their passwords - a massive improvement over manually entering all the advanced credentials as usual.
So, I council patience before concluding your phone is bricked. I can't figure out why it takes so long, but at least in my case - it worked
good luck to all! and lets get the memory mess fixed Microsoft!!!