Hi Jane
> 2. I also have been looking at online backup sites, in addition to a physical 
> back up. Carbonite looks good to me, but I am not familiar with the pros and 
> cons of online. I would value your opinion.

pro
- if your mac and backup become unavailable (as might happen if your house 
burns down or is burgled), you can get your data back!
- backups should be available 24/7, so if you're away from your mac and find 
you need some data, you can download it to a computer where you are right now
- backups will be encrypted and held in secure premises
- providing the hardware is the online provider's problem
- if you have several macs/PCs to back up, even if they are on several sites, 
you may be able to buy a family deal. 

con
- slow initial upload speed (It took about 30 days to upload 150 GB of data 
from my mac.)
- need to have internet access to retrieve stuff
- costs are ongoing (but hard disks don't last forever)
- backups are encrypted - you need to remember your login details if you want 
to retrieve data and are away from the mac that's connected to your account

Both local HDs and online should offer incremental backup, so that you can 
retrieve previous versions of files. 

To get around these limitations, I suggest doing both.
- Time Machine hourly incremental backups (or CarbonCopyCloner daily 
incremental backups) to a local HD will provide immediate access to stuff at 
home, without any need to go online, remember passwords, etc.
- Online backup is there as a last resort or for when you're away from home and 
find you don't have the files you need.

I've had good experience with CrashPlan (good customer service, a family deal 
to cover up to 10 computers for $6 per month). They also offer a service where 
you can use their software to back up to another device on a another site (such 
as a friend's mac or PC) for free. Of course, this depends on having a friend 
who has drive space and will leave their mac switched on and online for you to 
backup to it. IIRC data would be encrypted so your friend couldn't access your 
data unless you give away your password.)

I can't comment on how CrashPlan compares to other online backup providers. Of 
course, CrashPlan **claims** to be better - see 
http://www.crashplan.com/business/compare.html#stackup. You might want to try 
them and other providers' trial periods to see which suits you.

I hope this helps and isn't patronising.

Bruce

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