accidentally formatted my garmin edge 520 in "ExFAT", but now I reformed in a WINDOWS on FAT32

1st option, delete the profiles, power off / power on and see what happens.

2nd option, try to place the most recent gupdate.gcd file in the garmin directory on your 820.
Power off / power on and let's hope it will perform the update and restore your files.

3rd option: keep an eye on this forum, perhaps some better ideas will come up.

4th option: Google on Garmin and .rgn file.
Go from there.

5th option: return the unit and pay the standard fee for a refurbished unit.

Good luck

Hello, I managed to solve it, but it is very complex, I called GARMIN technical support here in Brazil and they failed that my cyclocomputer was doomed and that I could discard IT (PLAY IN THE GARBAGE, HE SAID WITH THESE WORDS), not satisfied I started researching the operation and pattern of these devices. I found that in the forums, both Brazilian and international, people had the same problem as mine and none were solved by forum experts.
I bought my GARMIN with great difficulty, because in Brazil things are absurdly expensive. In thanks to God for guiding me to find the solution and not having to spend R $ 2,999.00 which is his price here (3 MINIMUM WAGES) and also, to help other people with the same problem, I will make a tutorial complete about all existenter processes to perform in that application. And I will ask for an attitude from GARMIN to motivate its technicians to help their consumers, because we are the ones who pay their wages.
In advance, I thank everyone who responds to the forums, and devote their precious time, free of charge, to helping others.

Hi Emerson, good to hear your Garmin is OK.

Can you tell us what you have done to solve this?

Hi Emerson, I'm Brazilian too... Curious about your solution...