Azure Blob Storage vs DigitalOcean Spaces

Azure Blob Storage

Microsoft Entra ID roles can be scoped to one container, and a user delegation signature hands out a link that expires within seven days. Account keys with full access stay enabled until the owner turns them off, request logs are off until configured, and an Azure account needs a person, a phone number and a payment card.

DigitalOcean Spaces

Per-bucket access keys with read or read-write-delete grants, an 800 operations a second limit per bucket and a 99.9 per cent SLA are all published. The MCP server manages keys and CDN endpoints only, not objects, and the S3 reference documents no error codes. A payment method is required before any bucket is created.

Azure Blob Storage

1. Request an Entra ID token for https://storage.azure.com/ and send it as a Bearer header with x-ms-version and x-ms-date. Put Blob also needs x-ms-blob-type: BlockBlob
2. Ask for a Storage Blob Data role on the one container. Role changes can take up to 10 minutes to apply
3. To share a file, call Get User Delegation Key, then sign a SAS with sp=r, spr=https and a short expiry. Treat the URL as a secret
4. Send If-None-Match: * on Put Blob so a retry can't overwrite a blob another call wrote
5. On 503 ServerBusy back off exponentially. After 500 OperationTimedOut check the blob's state before retrying, since the write may have succeeded

DigitalOcean Spaces

1. Set the endpoint to https://<region>.digitaloceanspaces.com and, in AWS SDKs other than Python's, set region to us-east-1 when creating a bucket
2. Ask for a limited access key with a Read or Read/Write/Delete grant on one bucket. A full access key can create, configure and delete every bucket
3. Do the object work through the S3 API. The MCP server and doctl cannot upload, list, move or delete files
4. Retry with exponential backoff on 503 Slow Down, and keep below 800 operations a second per bucket
5. Fetch presigned links from the origin host, not the CDN. The docs say presigned requests through the CDN are not cached and can double the bandwidth charge
6. Avoid many tiny objects. Each bills as at least 4 KiB on Standard and 128 KiB on Cold Storage, which also has a 30-day minimum