I've formatted my microSD 32 GB Sandisk SDHC 3, Class 10 with SDFormatter which I was using on my raspi3 apparently with no issues. But now I can't read it on my pc (Win7) or any other one. I've tried with a SD adapter and with USB adapter with the same results: it plugs and unplugs constantly.
When I put it on my phone (Aquaris BQ M5) I format the card correctly, I keep getting the same issues when connecting the card "directly" to the pc BUT if I keep the card on the phone and connect the phone on MTP I can copy and delete and open files without problems... but I don't know how to give it format since there or use DISkPART or something similar.
How could I properly format my SD to install Raspbian on it?