Your video is showing as unavailable to me. So, I'm guessing that the device starts showing "Pre-boot mode" on the screen before eventually, without any action by you, moving to Mass Storage Mode where the grey PC icon is shown?

The fact that it eventually shows in Portable Devices (Dispoitivos portatiles) means of course that it has now attained Mass Storage Mode, so it should also show in Disk Drives (Unidades de disco) and in the 'safely eject media' menu of the notification area of your taskbar. This is my Garmin 5000 Linux device in MSM:

[Only registered and activated users can see links. ]

Now, if it has in fact got full MSM state you should be able to browse the file system. You can try this: Remove everything from the file system to a folder on your PC. Create a folder named 'Garmin' in the root of the nuvi, safely remove it from the PC and see if it will boot empty as it might be a faulty file causing the problem. If that doesn't work, try the following:

Put the original files and folders back in the nuvi, but not the file *.update which is in Garmin\Update folder (keep a backup of it). Mine is named "B074300.update" in my nuvi 5000 as shown below, your nuvi 885 has probably got the name "B072600.update". Then open the file named "GarminDevice.xml" in NotePad, search for this <SoftwareVersion>470</SoftwareVersion>and change "470" to "460", save the change then leave the nuvi connected to the PC.

[Only registered and activated users can see links. ]

Drag a new fresh Version 4.70 "[Only registered and activated users can see links. ]" file onto WebUpdater icon on your desktop, it will load the fresh file to the nuvi. Safely remove the device then try to boot it. It might work if the problem is due to a faulty firmware.