Return the next byte (or character), or -1 if none are available. Use the seek() function to place the pointer at the desired location. If in doubt, use the isDirectory() method to find out if it is a file. Use the open() function before you can read from a file Read from file from file at pointer position. Returns true on success, false on failure The position must be between 0 and the file size (inclusive). Set the pointer file to the pos ition indicated (unsigned long). Same as the print () method but adds a carriage return (CR) and new line (LF). Supported types: char, byte, int, long or string.īase (optional) the base in which to print the numbers: BIN for binary (base 2), DEC for decimal (base 10), OCT for octal (base 8), HEX for hexadecimal (base 16). Prints (saves) the data to the file, which must have been previously opened using the open() function in FILE_WRITE mode. Retrieves the current position of the pointer in the file. Used the seek() method to move the pointer within the file. Reads one byte of the file without going to the next. This is done automatically when the file is closed. Returns the number of bytes used by the file.Ĭlose the previously opened file with the open() functionĮnsures that all bytes written to the file are physically saved to the SD card. The File class is used to perform all read and write operations of individual files on the SD card.Ĭhecks if the file is not empty. Warning, the directory must be empty to be able to be deleted File class, file operations If the file does not exist, it is created automatically. The pointer is placed at the end of the file.
To avoid any compatibility problem, it is better to use the free SD Card Formatter utility developed by the SD association. You will have no problem reading your data. Windows, macOS, and Linux (including ARM versions). FAT16 and FAT32 file systems are supported by all operating systems. The SD library only supports FAT16 or FAT32 type formatting. Some third party applications will enable you to store their content on the SD card, but only if the application developer chooses to do so.Source: Format SD card as FAT16 or FAT32.Third party cameras might not offer this option. Through the Motorola camera application settings, you can select the default storage for pictures and movies captured through the Motorola camera app.New content side loaded to the card will also be available and viewable in media apps on the device Media, pictures, movies already on the card will be visible in the device photo gallery and media apps.You will get a notification that a new SD Card has been detected.
Carefully insert the tray back in the phone and make sure it closes securely.Ĭlick here for a tutorial on how to insert SD card.Ĭlick here for a tutorial on using external SD card as portable storage.Insert the tool that comes with your phone into the small hole on the card tray and pop out the tray.The moto x 4 allows you to expand your memory by using a micro SD card. You can insert an SD card to instantly add portable storage to your phone for media files.
Files you download from email or the Internet are stored there, too. Apps and app data (including photos, videos, and music files) are stored in your phone’s internal storage.