For android phone, download is impossible when you have lack of memory space in your phone. 

Although the phone is formed with external/ internal memory, the application cannot be stored in external memory. 

Please follow the methods shown below to secure more memory space.

■ Deleting applications & Internet cache

- Application : Click the application installed at 'Configuration-Application' and then click the 'Cache Deletion'/ 'Clear Cache' button 

- Internet : Execute Internet - Click to the menu key and then click the 'Cache Deletion'/ 'Clear Cache' button at 'Configuration - Personal Info. Protection/Configuration'

■ Deleting applications or information not in use

- Delete applications, photos, videos and other information stored in the internal memory which are currently not being used.

※ The cache deleting method may differ according to devices.