【】2. Don't keep messages forever

With its non-expandable memory, one of the major bugbears for iPhone owners is the storage capacity. Whether you've got a 16 or 64GBer, you just know that dreaded "Storage Almost Full" message will pop up at exactly the wrong moment.
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While there are steps you can take should that happen, it's also good practice to try and tread lightly on your memory in the first place. There are a few neat, easy tricks to try and make your iPhone's storage capacity last as long as possible.。

1. Don't shoot everyday video in high res
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While for some it may be essential to shoot video with their iPhones in the highest resolution possible, for most people's everyday cute kitty clips a lower resolution will suffice.
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You can change how the iPhone capture film footage by heading to "Settings," then "Photos & Camera," then look for where your phone gives you the "Record Video" options. Click on this to select 720p at 30fps. Simply change it back when you do want higher quality footage. 。

2. Don't keep messages forever。

By default, your iPhone saves all your text and multimedia messages forever. It's unlikely you really want iMessage, SMS and MMS correspondence going back years, so there is a way to have messages automatically delete after a sensible timeframe.。

In your "Settings" menu, scroll down to see the "Messages" option. From here look for the "Message History" section, tap it and then you can choose to delete messages after 30 days or a year. 。

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3. Don't keep all photos when shooting HDR。

The iPhone camera's "high dynamic range" setting is a clever tool when used correctly, but can be a real memory hog if you use it often. This is because it takes multiple exposures before combining those snaps into the HDR version.
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Rather than save down all the exposures, you can make your phone only save the final HDR pic. Find this option in "Settings," then "Photos & Camera," then scroll down to see the option to "Keep Normal Photo." Toggle it to off to save some storage space.
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4. Don't automatically download purchases made on another iDevice
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If you have multiple Apple devices, there's a default setting that sees all purchases across all devices automatically downloaded to every device linked with that iTunes account.。

While there will be apps and content you want to double up on, this is almost certainly not the case for every single purchase.。

To stop your iDevice doing this, go to "Settings," then "iTunes & App Store." Here you can toggle off to stop the automatic download of music, apps, books and audiobooks and updates. 。

5. Don't keep high resolution photos on your iPhone。

If you've activated the iCloud Photo Library service, then you can choose to enable a setting that saves you a ton of photo storage space.
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The option to "Optimize iPhone Storage" saves your pics and vids to your Camera Roll as per usual, but in a smaller format. The full-res originals are stored in iCloud, ready to access whenever you might need them.。

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If you go to "Settings," then "iCloud," then "Photos" and select "Optimize iPhone Storage" you'll be all set up. 。

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If you go to "Settings," then "iCloud," then "Photos" and select "Optimize iPhone Storage" you'll be all set up.。

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(责任编辑：知識)