How to create a project folder under an external SD card by Android5.1

now the demand is to read and write to the external SD card, but after Android4.4, the external SD card does not have read and write permission, and the only one with read and write permission is the storage/sdcard2/Android/data/PACKAGE_NAME/ folder, but after the APP is installed, the PACKAGE_NAME folder does not have
automatic generation. It is possible to build a directory manually in file management. Is there any way to make it generate automatically? Or there are other ways to read and write external SD cards

Java android

Sep.29,2021

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3c53b-346d0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3c53b-346d0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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