iPod flash memory capacity | iLounge Article

Article

iPod flash memory capacity

Ask iLounge offers readers the opportunity to get answers to their iPod-, iPhone-, iPad-, iTunes-, or Apple TV-related questions from a member of the iLounge editorial team. We'll answer several questions here each week, and of course, you can always get help with more immediate concerns from the iLounge Discussion Forums. Submit your questions for consideration using our Ask iLounge Submit Form. We reserve the right to edit questions for grammar, spelling, and length.

View the complete Ask iLounge archives...

Q: I am thinking about upgrading to a flash based iPod (like the iPod touch), and I am wondering if the real storage capacity is closer to the 8, 16 or 32 GB claimed. My 5G 30GB iPod only has an actual storage capacity of 27.84GB after software.

- Jason

A: In reality, the listed versus actual storage capacities for all iPod models have very little to do with installed software and more to do with differences in how storage units are calculated and advertised by hardware vendors versus how they are reported by software.

To a hardware manufacturer, one Gigabyte is equal to 1,000,000,000 bytes, whereas software being binary in nature uses a base-2 system where one Gigabyte is actually 1,073,741,824 bytes.

This is the main reason your computer only reports a storage capacity of 27.84GB for your 30GB iPod. Your 30GB iPod has a capacity of 30,000,000,000 bytes, which divided by 1,073,741,824 equals approximately 27.93. The remaining small difference (0.09 GB or about 90 MB) is attributable to the iPod operating system and software files itself.

Note that this is no different from your computer hard drive. A 160GB hard drive in your computer will only have a “real” capacity of around 149GB as far as your computer’s operating system software is concerned.

This does not change with flash memory chips. A 32 GB iPod touch is going to have a capacity of 32,000,000,000 bytes, which your computer will report as approximately 29.8 GB. The iPod touch operating system and support files are actually larger than the traditional iPod models due and will take up about another 300 MB, leaving you with around 29.5 GB of actual usable space as far as your computer is concerned.

« XtremeMac Luna X2

iPhone Gems: Five Sci-Fi Games, From Space Monkey to Star Wars »

Related Stories

Sign up for the iLounge Weekly Newsletter

Email:

Recent News

Recent Reviews

Recent Articles

Sign up for the iLounge Weekly Newsletter

Email:

iLounge is an independent resource for all things iPod, iPhone, iPad, and beyond.
iPod, iPhone, iPad, iTunes, Apple TV, Mac, and the Apple logo are trademarks of Apple Inc.
iLounge is © 2001 - 2015 iLounge, Inc. All Rights Reserved. Terms of Use | Privacy Policy