not a lot.lol
Picture might help
I can read German, however I cannot read that handwriting.
It is the normal greetings of a young SS soldier, Adolf Weinmueller, to acquaintances in the family Gustaf Walden, the grounds keeper of a noble estate , Schloss Ennsegg, in Enns in upper Austria.
The young SS soldier was posted to the SS Kommando, 14th company, Salza, Harz, which is interpreted by my very able and learned colleague.
It appears to be an example of SS-Feldpost from a camp within the KZ-Mittelbau-Dora system. The Stammlager (main camp) Mittelbau-Dora, was initially established as a satellite of the Buchenwald camp - one of over a hundred such sites. Mittelbau, being a sub-camp of Buchenwald, came under the administration of the main camp - hence the Buchenwald marking on the card. The camps within the Mittelbau-Dora system generally used false names to hide their location - or often, an abbreviation was used, such as "D" for "Dora". This was due to the nature of the forced labour being performed within the arms production facilities, i.e. the "V-Weapons" manufacturing etc. The Harz Mountains village named Salza, marked on the postal example shown, lies close to the main camp's location. Regarding the content, I believe it begins with greetings sent to the recipient, afterwhich I cannot assist but I am sure somebody else will be able to read more than I. More information on the Mittelbau-Dora site can be found within the thread linked below:
Update, thanks to F-B for assistance with the content.
Currently working on several KZ related projects, including items for the USHMM, Groß-Rosen Museum and various private concerns and studies. Available as a guide to KZ sites, contact for details.
"maka akaŋl oyate maŋi pi ki le, tuweŋi wíyópeya oki hi sni"
and as colleague Carl points out, across the Danube from Enns is the Mauthausen camp.
I did not at first see the Buchenwald post mark.
In any case, a left over from an unhappy and brutal time.