Short answer
Create an R2 bucket and an API token with Object Read & Write permission, then choose Cloudflare R2 in Aktar and enter your Account ID, keys and bucket name. Aktar fills in the endpoint for you.
- In the Cloudflare dashboard, open R2 and create a bucket.
- Give the bucket a public address: connect a custom domain, or enable the r2.dev development URL.
- Create an R2 API token with Object Read & Write permission for that bucket and copy the Access Key ID and Secret Access Key.
- In Aktar, open Settings → Destinations → Add Destination, choose Cloudflare R2 and enter your Account ID, keys, bucket name and the public address as Public Base URL. Leave Region as
auto. - Click Test Connection, then Save.
The full walkthrough with screenshots of every field is in the Cloudflare R2 guide.