diff --git a/weed/command/backends.go b/weed/command/backends.go
new file mode 100644
index 000000000..6654b18a1
--- /dev/null
+++ b/weed/command/backends.go
@@ -0,0 +1,5 @@
+package command
+
+// Register the tiered-storage backends here, at the binary's composition root,
+// so library consumers of weed/storage don't pull the backend SDKs.
+import _ "github.com/seaweedfs/seaweedfs/weed/storage/backend/all"
diff --git a/weed/storage/backend/all/all.go b/weed/storage/backend/all/all.go
new file mode 100644
index 000000000..df77a4ed1
--- /dev/null
+++ b/weed/storage/backend/all/all.go
@@ -0,0 +1,10 @@
+// Package all registers every tiered-storage backend factory. Binaries that
+// serve or manage tiered volumes blank-import it from their composition root;
+// keeping the registrations out of weed/storage lets library consumers avoid
+// pulling the backend SDKs into their dependency graph.
+package all
+
+import (
+	_ "github.com/seaweedfs/seaweedfs/weed/storage/backend/rclone_backend"
+	_ "github.com/seaweedfs/seaweedfs/weed/storage/backend/s3_backend"
+)
diff --git a/weed/storage/volume_info/volume_info.go b/weed/storage/volume_info/volume_info.go
index 19b1d336e..78c931af6 100644
--- a/weed/storage/volume_info/volume_info.go
+++ b/weed/storage/volume_info/volume_info.go
@@ -6,8 +6,6 @@ import (
 
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/volume_server_pb"
-	_ "github.com/seaweedfs/seaweedfs/weed/storage/backend/rclone_backend"
-	_ "github.com/seaweedfs/seaweedfs/weed/storage/backend/s3_backend"
 	"github.com/seaweedfs/seaweedfs/weed/util"
 	jsonpb "google.golang.org/protobuf/encoding/protojson"
 )
diff --git a/weed/storage/volume_tier.go b/weed/storage/volume_tier.go
index d398503a3..775db67f3 100644
--- a/weed/storage/volume_tier.go
+++ b/weed/storage/volume_tier.go
@@ -7,8 +7,6 @@ import (
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/volume_server_pb"
 	"github.com/seaweedfs/seaweedfs/weed/storage/backend"
-	_ "github.com/seaweedfs/seaweedfs/weed/storage/backend/rclone_backend"
-	_ "github.com/seaweedfs/seaweedfs/weed/storage/backend/s3_backend"
 	"github.com/seaweedfs/seaweedfs/weed/storage/needle"
 	"github.com/seaweedfs/seaweedfs/weed/storage/types"
 	"github.com/seaweedfs/seaweedfs/weed/storage/volume_info"