When updating the system on a phone, you can encounter a message indicating insufficient storage space. This issue arises because the system update process requires a significant amount of free space on the device. During the update, the update package must first be downloaded and then extracted locally, a process that requires more than twice the size of the update package itself. For larger updates, this can mean needing over 15GB of available storage to complete the operation.
In addition to this, the state of the device's internal storage can also impact the update process. If the storage is heavily fragmented, it can require even more free space to accommodate the updated files efficiently. To address this issue, it is recommended to clear unnecessary data, such as unused APPs, cached files, or large media, to ensure there is sufficient space available for the update.