It is a large-capacity text file viewer + scanned image viewer. It also provides convenient explorer function and TTS function. 1. Convenient Explorer - The list UI provides various filter functions, sorting functions, and also provides a filter function for words entered by the user. - Folder/file name change and deletion functions are possible. - Google/Naver review search of the file name of the selected item is possible with one click. - Google Drive can be used. - SD card can be used. - Fi