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Upgrading operating systems has become almost automatic, as it’s a crucial element of security maintenance. However, rapid advances in computer hardware have made it easy to forget the need to also consider system resources when upgrading to any new operating system. Clearly, this becomes more of an issue with hand-held devices, which typically are far more limited in memory and processing power than are laptop or desktop computers.
When upgrading hand-held operating systems, pay particular attention to the system resource requirements and whether security patches will still be available for the old operating system if you choose not to upgrade. If the old operating system will be supported for the foreseeable future and the features of the new OS aren’t business-critical, it may make sense not to upgrade.
Another very important consideration is whether the installation can be performed by downloading the installation files to a computer and plugging the device into that computer to install the upgrade. If available, this is often a far better way to upgrade a device, because it potentially eliminates the need for the installation files themselves to reside in the hand-held’s limited memory. The amount of space required to complete an installation can be substantially higher than the actual size of the new operating system, as this may include not only the installation files, but also a temporary backup of the old OS that the install script may create. Requiring a large amount of space for installation was a particular problem for many Apple users when iOS 8 came out in September 2014; while the OS was only supposed to take up 1 GB, installation required almost 5 GB of free space.
Once installation is completed, don’t forget to check the available memory afterwards. If it’s smaller than it should be, it’s possible that some installation files weren’t automatically deleted as they should have been.
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