ftp.ntua.gr:/debian/dists/unstable/main/installer-armhf/20210731/images/u-boot/Firefly-RK3288/?C=N&O=D 
Icon  Name                                                                Last modified      Size  
[DIR] Parent Directory                                                                         -   
[   ] u-boot.img.gz                                                       31-Jul-2021 07:20  273K  
[   ] idbloader.img.gz                                                    31-Jul-2021 07:20   32K  
[   ] Firefly-RK3288.sdcard.img.gz                                        31-Jul-2021 07:20  315K
Apache/2.2 Server at debian.noc.ntua.gr Port 80