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if you don't have backups already, then you need to back up NOW and instigate a regular backup routine - otherwise sooner or later you WILL lose data.
 
I cannot agree more: you should be backing up regularly regardless of a future major upgrade.

I'm lucky in that I have only ever lost (and then, thanks to Time Machine, recovered again) one file from my Mac, but it happened to be a completed university assignment the day before submission.

Try to start backing up before you lose something more important, like pictures.
 
I back up regularly and wouldn't even do a simple software update without making a clone backup first. You should have at least two backups in case one backup fails. I prefer clones since they are bootable and a lot faster than trying to do a time machine restore.
 
As everyone else has said, you should backup your files on a regular basis. It has nothing to do with Mountain Lion. In 23 years of using Macs, I have never lost a file due to an upgrade gone bad. However, I have lost files due to spontaneous hard drive failure. I have also lost files due to computer theft.
 
Backup before upgrading to ML

Yup, you should backup your data before the upgrade. Better be safe...
 
such a foolish approach. Everything and anything can go wrong, and then what?

Needs an upgrade. ;)

sarcasm_detector.jpg
 
Well the obvious thing is that you should always back up at this point, not just for a major upgrade, but for possible failure during your day to day use
 
.........

Time macheen exists for a reason.

Now get a harddrive dubble the size of your system drive for Time Macheen.
If its a laptop invest in a time capsoul.

now invest in two hardrives the same size as your system drive
I'd go with firewire drives just because they are faster then usb2 drives and use the two drives as a 2 week clones.
Clone on each drive every other week.

and use CCC to make a full system clone.
after the clone unplug the harddrives. and leave them in a safe place.

and if you no longer need certain data but want to keep it, burn it on disks, then put it in a disk box and put it away in a closet or fire box.
 
Yup, always back up your data, only a few months back I almost lost all my data, usually I have everything backed up, but I was formatting my Time Machine drive to delete all the old junk and do a clean back up.. My SSD partition got damaged, and I was unable to boot into Mac OSX or even access my files..

Luckily I got all my files back using software.. Now I take extra precautions, I'd also back up to the cloud aswell If I were you..
 
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