Alcatel One Touch Idol 6030 User Manual page 128

Phone storage
This menu displays the amount of internal phone storage in different
colours. The available space will be shown in grey, which shows the
amount of internal phone storage used by the operating system, its
components, applications (including those you downloaded), permanent
and temporary data.
If a warning message comes up saying that phone memory is
limited, you are required to free up space by deleting some
unwanted applications, downloaded files, etc.
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