Updating software without backing up.

You can normally perform every update to apps and the OS without any loss of files. You can even install a new version of the OS in place, while keeping your apps, data and settings. However, it's never ok to have no backup.

YES! If you are installing a new OS version (i.e. big number, not point update), then it's possible you might accidentally do a clean install and wipe your data. There is also the general risk inherent in data storage -- hard drives (and SSDs) can fail at any time. They can corrupt data. Things can go wrong. Your computer could catch fire or get stolen.

No, don't wait. Get an external drive and start backing up NOW.

Files with no backup are TEMPORARY. People still regularly post on this site "Oh, I accidentally deleted a file, how do I get it back?"; "Oh, my files are corrupted and won't open."
Apple introduced Time Machine in 2007. I have very little sympathy for people who say they lost files and did not have a backup.

 

Never, ever, ever run ANY software update without making a backup!

NEVER....

There is always the risk of something going wrong and making a mess.

You should do regular backups anyway unless you have no data, files, music, or photos on your computer that you want to save.

If you store nothing on your computer you can always restore or reinstall the OS and your apps.

Always backup! ALWAYS

 

Just read the tales of woe from folks who haven't had a backup in place and have lost everything....updates are fine to do without a backup, but don't use this as an excuse not to....Buy a cheap external HDD and use Time Machine, running without any backup just begs for problems down the line. I rely on my files, so have a double backup solution...my 3TB Time Capsule backs up my iMac and my MBA. Mission critical and all important files are further protected by my Pegasus R4 which runs in two RAID arrays, one for real time work, the other for archival purposes. A cheap USB HDD won't cost you much, and its just common sense.

 

USB 3 is significantly faster than USB 2. It also has better power support. Some USB2 drives need 2 USB sockets to be self-powered without their own supply.
You won't get any difference in speed if your computer only has USB 2 sockets, but of course if you upgrade your hardware in the future, you will be able to reap the advantage.

However, speed is not really an issue for a backup drive, as it just churns away in the background.

 

Hi , as i know if you want to upgrade your OS X you can do it without missing any documents or music etc... from your computer because it just upgrade the system but for more safe doing backup .