Hi Anthony
Thanks for posting in the Lucidchart Community! Unfortunately it is not currently possible to change the default folder location. All your Lucidchart documents will be backed up in a Google Drive folder named "Lucidchart."
However you can move your Lucidchart folder to any location in your Google Drive as well as the documents backed up in that Lucidchart folder to any other folder in your Drive. You can also create multiple subfolders within your Lucidchart folder. Please note that whenever a new document is synced it will be saved to your main Lucidchart folder and then you will be able to move it to whichever folder you want.
For more information about our Google Drive integration please check out the Lucidchart in Google Drive article from our Help Center and let me know if you have any questions.