HTML5 WebStorage suffers from different implementation on different platforms. Mobile Platforms & Browsers combinations differs in size of memory (disk space) quota assigned to each website. As per the W3 documentation
A mostly arbitrary limit of five megabytes per origin is recommended. Implementation feedback is welcome and will be used to update this suggestion in the future.
If you really need a large space in your application, you should consider using HTML Web SQL Database
or SQLite via the support SQLite plugin (clone the sample demo here
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