Access Denied

[nehalasim]

I have all permission. But still shows error. Possible Unhandled Promise Rejection (id: 2): Error: ENOENT: /storage/emulated/0/Download/DataBackup/prf.db: open failed: EACCES (Permission denied), open '/storage/emulated/0/Download/DataBackup/prf.db'

THIS IS MY CODE.

const onShare=()=>{

const full_path = RNFS.DownloadDirectoryPath + "/DataBackup/prf.db";
RNFS.exists(full_path)
.then((exist)=>{
  if(exist){
      RNFS.moveFile(full_path, RNFS.DownloadDirectoryPath+"/prf_new.db");
      console.log("exist"+RNFS.DownloadDirectoryPath);
      console.log(RNFS.DownloadDirectoryPath);

  }else{

    console.log("not exist");

  }
}).catch((error)=>{
  console.log(error);
})

}

N.B: when I run the create folder function, the is created successfully in Downlaod folder. RNFS.exists(RNFS.DownloadDirectoryPath + "/DataBackup") .then(exists => { if (!exists) { RNFS.mkdir(RNFS.DownloadDirectoryPath + "/DataBackup") }}).catch(error => { console.error("Error checking MEMBER directory existence:", error); });