Thread: how to save a directory and file tree

i have made a linked list of the following type which contains directories and files info:

Code:

struct DIR
{
filename // file or directory name
fileID // file or dir ID
ParentID// parent dir's ID
// other info crucial to saving
}

my question is how to save files and directories such that a complete tree is saved?
Please give me some guidelines. I'll be thankfull.

yes the next pointer is already there, which I forgot to mention. what I need is an algo to save the tree.

Code:

struct DIR
{
     filename // file or directory name
     fileID // file or dir ID
     ParentID// parent dir's ID
     // other info crucial to saving
     DIR* next;
}