What should I do if the error message `could not read local://...:download sst failed` is returned during data restore?

When you restore data, each node must have access to all backup files (SST files). By default, if local storage is used, you cannot restore data because the backup files are scattered among different nodes. Therefore, you have to copy the backup file of each TiKV node to the other TiKV nodes. It is recommended that you store backup data to Amazon S3, Google Cloud Storage (GCS), Azure Blob Storage, or NFS.