Thread: Windows cannot detect internal and SD memory for Zumo 390LM

So to re-cap: With Cure fw loaded the device and inserted sd card can be seen by a PC but not with normal fw and files loaded.

Did you hard-reset it (or better still, clear its nonvol memory)? If that doesn't help then re-load the cure fw and format it again using RMPrepUSM. Create an empty folder in the root named Garmin, load original fw again, boot it and then see if it can be seen by PC without any other files loaded (also leave the card out of it for now).

So to re-cap: With Cure fw loaded the device and inserted sd card can be seen by a PC but not with normal fw and files loaded. .................... ====> Yes
Did you hard-reset it (or better still, clear its nonvol memory)? ........... ====> Yes, using RMPrepUSM
If that doesn't help then re-load the cure fw and format it again using RMPrepUSM. ..........====> Did it again
Create an empty folder in the root named Garmin, load original fw again, ........====> Did it again
boot it and then see if it can be seen by PC without any other files loaded (also leave the card out of it for now). ....... ====> SD Card out, latest original fw, only Garmin folder in the internal memory ..... ===> CAN NOT SEE SD CARD BY THE PC

Originally Posted by FRCASTRO

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Did you hard-reset it (or better still, clear its nonvol memory)? ........... ====> Yes, using RMPrepUSM

RMPRepUSB is solely a re-formatting tool. It erases the visible file system but cannot "reset" the user data where some corruption might be present. Only a hard-reset or clear nonvol can do that. Many weird behaviors can be corrected by resetting. Read: [Only registered and activated users can see links. ] and [Only registered and activated users can see links. ]

I had already wiped all data from nonvol and even with that device is still not recognized by windows with the original fw.