Hello,
I found out that my problem was actually due to several things: MSC mode, new installer 1.2.1 that did not recognise my e-270, (wasn't listed as a hard drive), BUT was fooling me by doing complete installation (I don't know where and to what?) but my sansa wasn't recognised or updated.
I had the previous installation 6-8 months ago and since then, i hardly used it...
So I reinstalled 1.0.7 and bingo

, everything went smooth, just like it should, SD is a drive-H and e-270 drive-I. also I can safely remove it...
cheers