SafePoint from BookLive to Dlink's Router USB attached HDD

Hello Everyone!
Im having a struggle with my unit this time, it’s a brand new Book Live that I has being using to receive a safepoint from my primary Book Live, as the primary finally dies (too many bad sectors)
I decided to move all the data from _WDPROT to the Public share and start using it as Primary drive.

I’ve attached a Passport Ultra to the USB port of my router, I started a SafePoint to it but I cant make it work.
I get the 1100 error on the creation and after that 1102 after another atempts.
I searched the forum almost entirely and I saw a lot of suggestions, something about formatting of the USB (those were for HDDs attached to the unit itself, like on MyClouds)
Something related to special characters.
Im trying everything, every attempt takes me 15hs because Im transferring 510Gb

Past night I turned off the DLNA server because apparently still “indexing” (hope this can finish someday, I will let this topic for later) so I turned off and started again, is backing up again but…

Anyone else can share any experience with a similar scenario than mine’s? Because Im lost,
Safepoint from one Book to another were working OK…

Hope someone can share anything with me, thanks guys!

after update to latest firmware I was unable to reach the USB destination now. So… f… up!
:frowning: