You can convert it from a pruned to a full node by changing the config file and restarting. But a full node will require 500GB+ of drive space.
If you are able to copy the existing data from your Raspberry Pi node you could avoid resyncing the full node too. Otherwise it could take several days+ to sync your node after you change the configuration and restart.
On Windows the bitcoin.conf file is located in the %APPDATA%\Bitcoin directory.
To change to a full node try this:
1) Stop the Bitcoin node software.
2) Locate your bitcoin.conf configuration file, typically found in the Bitcoin data directory.
3) Edit the bitcoin.conf file and either remove the prune configuration line or set it to prune=0.
4) Save the changes and restart your Bitcoin node software.
Thanks so much! I have a Mac, sorry should have mentioned that.. but sounds like should work the same or no?
Yeah, location of the file is different but otherwise the same process.
On macOS, the bitcoin.conf file is located in the ~/Library/Application Support/Bitcoin/ directory. You can access it using Finder by clicking on "Go" in the menu bar, then selecting "Go to Folder" and entering ~/Library/Application Support/Bitcoin/.
