No matching function for call to 'std::basic_ofstream

So I was playing around a bit with file ofstream and ifstream and got stuck into a compiler problem that I just simply don't know what it means...

Let's start.

I have the following class:

class FS{
    public:
        string name;
        long long int size;
        long long int freeBlocks;
        long long int usedBlocks = 0;
        int blocksize = 128;
        vector<FS_File> file_list;
        char * ptr;                      //This is a malloc pointer
        void saveTo(ofstream& of); 
        void openFrom(ifstream& inf); 
    };

The problem occurs in the saveTo() function:

void FS::saveTo(ofstream& of){ 
  of.write(&name, sizeof(name)); 
  of.write(&size, sizeof(size));
  of.write(&freeBlocks, sizeof(freeBlocks)); 
  of.write(&usedBlocks, sizeof(usedBlocks)); 
  of.write(&blocksize, sizeof(blocksize)); 
  of.write(&file_list, sizeof(file_list));
  of.write((char *)&ptr, sizeof(ptr));
}

The compiler gives me the next error:

functions.cpp   In member function 'void FS::saveTo(std::ofstream&)':


    [Error] no matching function for call to 'std::basic_ofstream<char>::write(std::string*, long long unsigned int)'

    [Error] no matching function for call to 'std::basic_ofstream<char>::write(long long int*, long long unsigned int)'

    [Error] no matching function for call to 'std::basic_ofstream<char>::write(long long int*, long long unsigned int)'

    [Error] no matching function for call to 'std::basic_ofstream<char>::write(long long int*, long long unsigned int)'

    [Error] no matching function for call to 'std::basic_ofstream<char>::write(int*, long long unsigned int)'

    [Error] no matching function for call to 'std::basic_ofstream<char>::write(std::vector<FS_File>*, long long unsigned int)'

    [Error] no matching function for call to 'std::basic_ifstream<char>::read(std::string*, long long unsigned int)'

    [Error] no matching function for call to 'std::basic_ifstream<char>::read(long long int*, long long unsigned int)'

    [Error] no matching function for call to 'std::basic_ifstream<char>::read(long long int*, long long unsigned int)'

    [Error] no matching function for call to 'std::basic_ifstream<char>::read(long long int*, long long unsigned int)'

    [Error] no matching function for call to 'std::basic_ifstream<char>::read(int*, long long unsigned int)'

    [Error] no matching function for call to 'std::basic_ifstream<char>::read(std::vector<FS_File>*, long long unsigned int)'

Whenever I try to call the next code:

ofstream outfile;
string filename = curFS.name + ".dat";
outfile.open(filename, ios::binary | ios::out);
curFS.save(outfile);
outfile.close();

I've tried a few things, but nothing has worked...

What does the compiler error means? How can I solve it?