Flashing folder with question mark

Hello guys,

I know this topic was discussed before but I think mine is a bit different.

I get the flashing folder with question mark when I startup my macbook air (early 2014, 13").

I then did the cmd+R at startup and get to the recovery mode, I go for "first aid" and can startup normally again. Then after using the Mac for like 10/20 minutes, it freezes. I press and hold to shut it down then and when I startup again -> question mark folder.

This worked a few times, but not anymore.

Now when I go to recovery, I only get the Internet Recovery mode. There, all I can do is the "Verify Disk" and that doesn't help.

As well all I see is my OS X Base System in the disk utility and not my drive anymore, as well as when I try to Reinstall OS X I cant choose a Drive to install it on.

if my SSD would be broken, why would it just work sometime and then not again anymore.

Can there be any other reason for this?

Appreciate any help.

Cheers