not working: "D:\oyunlar\No Man's Sky\Binaries\NMS.exe" -home "D:\oyunlar\No Man's Sky\"
not working: regedit add

Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\GOG.com\Games\1446213994]
"SAVEGAMEFOLDER"="D:\\oyunlar\\No Man's Sky\\"

To my knowledge, there is no way to get No Man's Sky to save to another location using command line parameters, registry entries or fiddling around with the environment -- my guess is, they simply use the corresponding Windows API call to get whereever Windows thinks %APPDATA% is located.

There is, however, a way to actually trick No Man's Sky a little -- by creating a symbolic link pointing to the location, where you'd like your savegames to appear.

Here's an example, provided your saves are in C:\Users\me\AppData\Roaming\Hellogames, and you want them to be in e:\mysavegames\nomanssky\Hellogames

1. Make a backup of your savegame folder (C:\Users\me\AppData\Roaming\Hellogames)
2. Remove your current savegame folder (C:\Users\me\AppData\Roaming\Hellogames)
2. Create the folder, where you want to store the savegames (e:\mysavegames\nomanssky)
3. Open cmd.exe as Administrator
4. Type the following command:
mklink /d C:\Users\me\AppData\Roaming\Hellogames e:\mysavegames\nomanssky\Hellogames
5. Copy the backup of your savegame folder into e:\mysavegames\nomanssky, so that afterwards it contains a Hellogames folder

Start No Man's Sky, and check, if things work correctly.

Edit: Tried to correct my usual plethora of typos ...

command for working no space
folder name "no man sky" not working
folder name "nomansky" working
interesting

Tested mklink /d C:\Users\me\AppData\Roaming\Hellogames "e:\temp\no mans sky\Hellogames" -- works for me, the game starts normally and I can load and save. Maybe you forgot to quote the name containing the spaces ?

tanks yes
d:\x x not working
"d:\x x" working