Best Compression For Archiving

[brispuss]

Not sure if this is the right part of this forum to ask this, but?


Trying to save space on HDD by LOSSLESSLY compressing some games for archiving purposes. And later decompressing these games LOSSLESSLY to match the orginal files exactly (bit perfect).


At this stage, concentrating mostly on compressing .dds, .jpg, .ogg, and .png files from games.

So far, compressing *.dds files seem to be quite good using lolz directly with -d128 option and with all other lolz options at default settings.

Here is a sample dds file in case someone wishes to improve broch_02.dds compression?

Now, having problems compressing *.jpg, *.png, and *.ogg files (LOSSLESSLY). Since these files are already compressed (to a degree), it is difficult compressing these files much smaller.

Here are some sample files -

he-crown-solomon117.jpg

common_game_04.png

amb_in_boat_cabin.ogg


Can anyone suggest suitable tools and their settings to losslessly compress these (sample) files, please?

Thank you!