A backup also looks after all your settings so you can reinstate a device 
following a calamity. 

If you are comfortable not having this option, then don't worry about it. 

>>>  If I sync my iPhone  with the  computer  does it mean that photos get 
>>> removed from my computer if they're not on the iPhone?
>>> 

No. The computer is the master, the iPhone the slave. 

Tim

Sent from Tim's iPhone

> On 4 Jan 2016, at 7:57 AM, Bill Parker <ren...@westnet.com.au> wrote:
> 
> My question is  - back-up what exactly?  
> 
> The only thing I have on my iPhone is a small collection of reference photos 
> which get copied ( that’s a verb I actually understand) to my MBP and deleted 
> off the phone.  The rest is a series of partly finished crossword puzzles and 
> a partly read novel.
> Bill
> 
>> On 4 Jan 2016, at 00:14, Susan Hastings <shasti...@iinet.net.au> wrote:
>> 
>> Hi Michael, I also found another article which takes you through all of it.
>> 
>> 
>> https://deciphertools.com/blog/2015_01_27_itunes_sync_vs_backup_ensure_data/
>> 
>> 
>> It is a step by step guide similar to what Ronni would give you.
>> 
>> If neither of these threads make sense to you its possible to just do your 
>> own Google search.
>> 
>> cheers, Susan.
>> 
>>> On 3 Jan 2016, at 4:57 PM, Michael Hawkins 
>>> <michael.hawk...@mjhawkins.com.au> wrote:
>>> 
>>> I'm a tad confused about the advantages and differences between backing up 
>>> my iPhone and syncing my iPhone. 
>>> 
>>> I avoid technological clouds  of any description as much as I can, and so I 
>>> assume if I backup my iPhone I plug it in to my computer and save the 
>>> entire contents into iTunes. 
>>> 
>>> I also assume that if I lose or destroy or break my iPhone somehow, I can 
>>> download to the replacement iPhone the content saved on my MacBook Pro, 
>>> including photos and videos.
>>> 
>>> I think that if I sync my iPhone to my computer, all I do is transfer from 
>>> the computer to the iPhone photos that aren't on the iPhone and content in 
>>> iTunes from he computer to the iPhone that isn't in the IPhone, and 
>>> vice-versa.
>>> 
>>> Syncing: What happens to music I've got on my computer, that I didn't buy 
>>> through iTunes? By law I'm allowed to copy a cd I have bought. Does it get 
>>> transferred to my iPhone when I sync the phone with he computer or, if it's 
>>> music get is not on the iPhone, does syncing mean that it gets removed from 
>>> the computer?
>>> 
>>> And how do photos fare? I've got hundreds of photos on the computer they 
>>> aren't on the iPhone, and dozens on the iPhone that aren't in the computer. 
>>> If I sync my iPhone  with the  computer  does it mean that photos get 
>>> removed from my computer if they're not on the iPhone?
>>> 
>>> Cheers,
>>> 
>>> Michael
>>> Sent from my iPhone
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> 
> Dr Bill Parker
> ren...@westnet.com.au
> 
> 
> 
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