Why not just Restore from your latest backup and get back to business?
How about Time Machine?
Surely you did not go about your music production without having at least one backup of your important files?
As is said many times in these forums, we only lose what we don't back up"
Yes, you could have messed something up with Terminal and No, it is doubtful that you have some piece of malware that does this and No, you do not have a Virus.
Shut down the Mac. (presuming it is an iMac, you didn't say)
Disconnect all peripherals except the keyboard and mouse
Reboot and immediately hold down the Command + Option + P + R keys. Keep them down until you hear the third chime, then let go
Open Disk Utility. Run Repair Disk Permissions.
I am using a Mac OSX 10.8.4 2.7Ghz
Today I had all my wav. samples (for music production) disappear from my 'samples' folder in directory Users/Me/Documents/Samples.
All the folders & subfolders are in there, but there are no wav. files. The wav. files aren't in another location on the computer.I have used Terminal to search for the files in case they are hidden but haven't had any luck and the folder sizes are less than 1mb so it seems like nothing is hidden.
I had a backup of one of these folders on an external hardrive so I transferred the folder from the harddrive to my mac and tried opening the backup folder and the exact same thing happened...no Wav.s
The strangest thing is I opened the same folder which was on the harddrive on my brothers computer and the folders now have no contents (whereas they did 5 mins ago on my bros computer).
Now it's deleted all my brothers music off his external harddrive!!
Did I screw something up in Terminal or do I have a virus/malware??
Any help would be greatly appreciated!