One Moral of the story - KEEP REGULAR BACK-UPS of all your SD Cards on your PC and even transfer them to removable media such as CD, or Memory Stick, in case of a PC Crash.
Like many other players, I have literally Thousands of hours of irreplaceable work on SD Cards. I would hate to think that due to one small 'slip' or 'glitch' that I would lose the lot or even some of them!

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Willum

After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley