How can I download all of this JPL MRO imaging data at once? There are several files. I think that they all needs to downloaded to have the complete dataset. Is there a particularly good way to download them all in one shot?


https://pds-imaging.jpl.nasa.gov/volumes/mro/release50.html


The page shows over 100 individual icons, one for each volume.
You can do it, I will leave you to decide whether you should... As an experiment, I downloaded the mrox_3374 subdirectory of files and the result came out to 3.7 GB. Assuming the other 99 "volumes"/directories are the same, this multiplies out to 370 GB.

I downloaded these data using wget which is a standard utility on Unix/Linux and Mac computers. It is also available for Windows systems; this Wget for Windows 10 tutorial should be of some help in getting it installed and going.

Once this is installed you can do:

wget -np -nH -c --cut-dirs 4 -r https://pds-imaging.jpl.nasa.gov/data/mro/mars_reconnaissance_orbiter/ctx/mrox_3374/


The key flags are -r which means recurse into directories, -np which means don't ascend to the parent directory (to stop it sucking down the entire website), -c which will continue the transfer if it fails and you restart the wget and the --cut-dirs 4 which cuts 4 levels of the directories off the recursive download (the data/mro/mars_reconnaissance_orbiter/ctx parts)

If you really, really want to suck down the whole thing you could do:

wget -np -nH -c --cut-dirs 3 -r https://pds-imaging.jpl.nasa.gov/data/mro/mars_reconnaissance_orbiter/ctx/


and that should grab everything.