I am a server owner doing some testing in a small creative world and I am trying to find out where the server saves the Carpenters Blocks safe files. I checked the files with NBTExplorer and simply couldn't find it.
If you could tell me so I can see it please that would be wonderful, or if the safe has a hardcoded inventory and not located in world files tell me. Thx for your time

If we're talking about the Carpenter's Safe contents, it extends vanilla chests and can be accessed the same way; look for inventoryContents field in NBT data.