Step 1: Signup for the Wasabi account at https://console.wasabisys.com/
Step 2: Get the wasabi Access key and Secret key: go to https://console.wasabisys.com/#/access_keys -> Create new Access key as shown in the images below
Step 3: Go to https://console.wasabisys.com/#/file_manager/ and click the "Create Bucket" button and enter your desired bucket name (make sure that the name is globally unique) and the bucket region.
Step 4: Select Wasabi as the Backup method in the WPTC plugin fresh install page and enter the keys and the bucket details created above.
From now on, your backups will be stored in Wasabi by WPTC.