[Threshold]

pawn Код:

if (strcmp("/loadmyhp", cmdtext, true) == 0)
    {
        new File:hp=fopen("/UsersHP.ini", io_read), string[200], str[200];
        fread(hp, str);
        format(string, 200, "The health you saved = %f", floatstr(str));
        SendClientMessage(playerid, -1, string);
        fclose(hp);
        return 1;
    }

Take a closer look people, where is the value of 'str' coming from? That's correct, nowhere... you haven't set a value for 'str' in your /loadmyhp command. So it is reading 0 by default, therefore it will load 0 as well.