char pointer to string, then into array of strings. *** Error in `./a.out': malloc(): memory corruption: 0x0900c3b0 ***

I get this error: * Error in `./a.out': malloc(): memory corruption: 0x0900c3b0 *

I am trying to convert a char pointer to a string, and then put that string into an array of strings for later use. I don't understand why this is not working. I am assuming that the string I put into the array gets deleted, and that might be the reason.

Error happens when I do new string(firstByte)

Here is the code:

char *entries[16] = {nullptr};


string *strEntries[16] = {nullptr};
  char * firstByte = 0;
  stringstream s;
  size_t len;

  string sfB; 
  firstByte = new char[sizeof(char)];
  count = (FirstRootDirSec*512) + 32;
  lseek(fd, count, SEEK_SET); //Takes us to 32 bytes after root directory, or first entry

  //so either find a way to just read in one byte at a time, or 
  //take the first character of firstByte. firstbyte[0]. That's probably good.
  for(int i = 0; i<16; i++){
     //check first byte
     //if first byte is a 41 or 40, then it is a long directory, and then we can jump ahead 32 bytes, or 0x20


    lseek(fd, count, SEEK_SET); //Takes us to 32 bytes after
    read(fd, firstByte, count);
    count+=32;

    if(firstByte[2] != '\0'){
      //then not a long entry, and we can put it in entries.
//       string str(firstByte);


      //error happens when I do new string(firstByte)
      **entries[i] = firstByte;
      strEntries[i] = new string(firstByte);
      cout<<entries[i]<<"blah"<<endl;**

}
}