After upgrading to lollipop, external Sd card disappears. Or not recognized

[jasonef]

I used to copy anything to my ext sd of 64 gb.
Now, after upgrading to lollipop, it happens that it just disappears and it's not recognized. So I have to use the android tool to erase and copy files again. This happens very often. What can I do?

[Uliwooly]

@jasonef

backup your SD card and reformat it, also, if you can test another SD card with your phone.