Copy new files on old files in same folder

Hi all,

I am having a folder and in that folder i am having some file...

Now i have written a code which makes this folder and write files in this particular folder.....

My problem is if folder is existing at that place then a new copy is been created with same name and having same file in previous folder only, where as what i want is to copy new files on previous files....

How to achieve this....

Can anybody please help me in this

Thanks in advance

Before making the folder, check for its existance. If the folder exists, skip making the folder and write files. The files will be overwritten, if it already exists.