Hello, I recently bought an Arduino Nano rp2040 connect but as soon as I try to upload anything (even the blink) it goes in booloader mode, opens a folder and it disconnects from the computer. I unsuccessfully tried using both the ide and the online editor, change pc and usb cable and even done the factory reset.
Its my first time using an arduino, Can anyone help me? 
When the folder opens, just copy the compiled .uf2 file to it. After a couple of seconds the folder will close and the board will restart and run the sketch. I believe on Windows the binaries are written to \Documents and Settings\Local Settings\Temp\arduino_build_xxxxxx. On Linux/Mac it is /tmp/arduino_build_xxxxx. You should find an Arduino related folder in there. It will contain a number of files including the .uf2 file.
I often use the 'Export to Compiled Binary' option and put the board into BOOTSEL mode manually, but if your board is new, it may be that this manual copy needs to be done at least once and then it will work automatically. A brand new Pico board that has never been programmed automatically comes up in BOOTSEL mode.
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