Function like; myDFPlayer.readCurrentFolderNumber();

Hi, I am using arduino nano with DFPlayer mini (DFR0299) and require a library function to get current folder number like similar to get current file number myDFPlayer.readCurrentFileNumber();

I have several folders names 01 to 28 and each folder have different number of mp3 files like (001.mp3 to 100.mp3)
On power up the system, I want to know the number of last played mp3 File number and the Folder to which the last played mp3 file belongs.

Thanks in advance