How can I create a folder on internal storage of DMP 4310?

[quake3bak]

Hi. I'm a junior engineer in Korea.

I have a question about DMP 4310 with creating a folder of internal storage.

I can acess the internal storage but, I cannot make a folder or file uploading.

I already checked about Access mode - read and write, and also DMP management - FTP Server On, and password too.

It's enable to read but, unable to make a file or a folder.

when It rejected my order, I saw a message on my screen like this.

"550 Create directory operation failed."

I searched this letters, but couldn't get any information to handle this issue except for showing of permision error message of linux.

now, I am begging for your kindness.

what am I suppose to do?

[quake3bak]

I checked my permission, and I got the result.

By the result, I cannot make any folders or files except for path of /usb_1/

So, I can upload file to /usb_1/ and play it. that's it.

self question, and self answer... so sad to less people to answer this DMS section...