Navigate to [https://mkpartners-a-dev-ed.lightning.force.com/lightning/setup/DataLoaderIo/home](https://mkpartners-a-dev-ed.lightning.force.com/lightning/setup/DataLoaderIo/home)
Click "[Dataloader.io](http://Dataloader.io)"
Click "[Dataloader.io](http://Dataloader.io)"
Click "Launch [dataloader.io](http://dataloader.io)"
Switch to tab "[https://mkpartners-a-dev-ed.my.salesforce.com/HelpAndTrainingDoor?version=2&resource=https://dataloader.io/](https://mkpartners-a-dev-ed.my.salesforce.com/HelpAndTrainingDoor?version=2&resource=https://dataloader.io/)"
Click "Confirm"
Click "Login with Salesforce"
Click "NEW TASK"
Click "IMPORT"
Click "Update"
Click "Account"
Click "Next"
Click here.
Click "Upload CSV"
Click here.
Click "Save & Run"
Click "Run"