diff --git a/replicator/config.go b/replicator/config.go
new file mode 100644
index 0000000..0ee72ba
--- /dev/null
+++ b/replicator/config.go
@@ -0,0 +1,20 @@
+package replicator
+
+import "net/url"
+
+type (
+	Config struct {
+		Local  Storage
+		Remote Storage
+	}
+
+	Storage struct {
+		Driver      url.URL
+		Full        Stream
+		Incremental Stream
+	}
+
+	Stream struct {
+		Disabled bool
+	}
+)
diff --git a/replicator/driver.go b/replicator/driver.go
new file mode 100644
index 0000000..85ed8a3
--- /dev/null
+++ b/replicator/driver.go
@@ -0,0 +1,35 @@
+package replicator
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+)
+
+type (
+	Driver interface {
+		Keys(context.Context) (chan Key, error)
+		Get(context.Context, Key) (Value, error)
+		Set(context.Context, Key, Value) error
+		Del(context.Context, Key) error
+	}
+
+	Key struct {
+		Namespace string
+		Key       string
+	}
+
+	Value struct {
+		Value   []byte
+		Version []byte
+	}
+)
+
+func NewDriver(ctx context.Context, driver url.URL) (Driver, error) {
+	switch driver.Scheme {
+	case "filetree":
+		return NewFileTree(driver)
+	default:
+		return nil, fmt.Errorf("unknown driver spec %s", driver.String())
+	}
+}
diff --git a/replicator/driver_test.go b/replicator/driver_test.go
new file mode 100644
index 0000000..4479015
--- /dev/null
+++ b/replicator/driver_test.go
@@ -0,0 +1,51 @@
+package replicator
+
+import (
+	"bytes"
+	"context"
+	"testing"
+	"time"
+)
+
+func TestDriverInterface(t *testing.T) {
+	var _ Driver = FileTree("")
+}
+
+func testDriver(t *testing.T, d Driver) {
+	ctx, can := context.WithTimeout(context.Background(), time.Second*2)
+	defer can()
+
+	key := Key{Namespace: "x/y", Key: "z"}
+	value := Value{Value: []byte(t.Name()), Version: []byte("1")}
+
+	t.Run("get does not exist", func(t *testing.T) {
+		v, err := d.Get(ctx, key)
+		if err != nil {
+			t.Errorf("getting 404 returned an err: %v", err)
+		}
+		if v.Value != nil || v.Version != nil {
+			t.Errorf("expected nil for 404 but got %q/%s", v.Value, v.Version)
+		}
+	})
+
+	t.Run("404 set get", func(t *testing.T) {
+		if err := d.Set(ctx, key, value); err != nil {
+			t.Fatal(err)
+		}
+
+		v, err := d.Get(ctx, key)
+		if err != nil {
+			t.Errorf("getting key returned an err: %v", err)
+		}
+		if !bytes.Equal(v.Value, value.Value) {
+			t.Errorf("value didnt match set-get: want %q, got %q", value.Value, v.Value)
+		}
+		if !bytes.Equal(v.Version, value.Version) {
+			t.Errorf("version didnt match set-get: want %q, got %q", value.Version, v.Version)
+		}
+
+		if err := d.Del(ctx, key); err != nil {
+			t.Errorf("failed to clean up: %v", err)
+		}
+	})
+}
diff --git a/replicator/filetree.go b/replicator/filetree.go
new file mode 100644
index 0000000..5a71cda
--- /dev/null
+++ b/replicator/filetree.go
@@ -0,0 +1,34 @@
+package replicator
+
+import (
+	"context"
+	"io"
+	"net/url"
+	"path"
+)
+
+type FileTree string
+
+func NewFileTree(spec url.URL) (FileTree, error) {
+	p := spec.Path
+	if spec.Host != "" {
+		p = path.Join(spec.Host, p)
+	}
+	return FileTree(p), nil
+}
+
+func (tree FileTree) Keys(ctx context.Context) (chan Key, error) {
+	return nil, io.EOF
+}
+
+func (tree FileTree) Get(ctx context.Context, key Key) (Value, error) {
+	return Value{}, io.EOF
+}
+
+func (tree FileTree) Set(ctx context.Context, key Key, value Value) error {
+	return io.EOF
+}
+
+func (tree FileTree) Del(ctx context.Context, key Key) error {
+	return io.EOF
+}
diff --git a/replicator/filetree_test.go b/replicator/filetree_test.go
new file mode 100644
index 0000000..b3cd02c
--- /dev/null
+++ b/replicator/filetree_test.go
@@ -0,0 +1,20 @@
+package replicator
+
+import (
+	"net/url"
+	"testing"
+)
+
+func TestFileTree(t *testing.T) {
+	d := t.TempDir()
+	u, err := url.Parse("filetree:///" + d)
+	if err != nil {
+		t.Fatal(err)
+	}
+	tree, err := NewFileTree(*u)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	testDriver(t, tree)
+}