diff --git a/tree.go b/tree.go
index a574b4f..c7469dc 100644
--- a/tree.go
+++ b/tree.go
@@ -37,7 +37,7 @@ type Tree struct {
 
 var readableFormats = []string{".md"}
 
-const attachmentDirName = "__a"
+const AttachmentDirName = "__a"
 
 func (t Tree) FileById(id string) (File, error) {
 	for _, f := range t.Files {
@@ -188,7 +188,7 @@ func moveAttachments(dir string) (map[string]string, error) {
 		}
 
 		var clearDir = strings.TrimPrefix(dir, "./")
-		if info.Mode().IsRegular() && !slices.Contains(readableFormats, path.Ext(fullPath)) && !strings.HasPrefix(fullPath, fmt.Sprintf("%s/%s", clearDir, attachmentDirName)) {
+		if info.Mode().IsRegular() && !slices.Contains(readableFormats, path.Ext(fullPath)) && !strings.HasPrefix(fullPath, fmt.Sprintf("%s/%s", clearDir, AttachmentDirName)) {
 			f, err := os.Open(fullPath)
 			if err != nil {
 				return err
@@ -200,10 +200,10 @@ func moveAttachments(dir string) (map[string]string, error) {
 				return err
 			}
 
-			_ = os.Mkdir(fmt.Sprintf("%s/%s", dir, attachmentDirName), 0755)
+			_ = os.Mkdir(fmt.Sprintf("%s/%s", dir, AttachmentDirName), 0755)
 
-			attachmentRegistry[fullPath] = fmt.Sprintf("%s/%x%s", attachmentDirName, h.Sum(nil), path.Ext(fullPath))
-			newPath := fmt.Sprintf("%s/%s/%x%s", dir, attachmentDirName, h.Sum(nil), path.Ext(fullPath))
+			attachmentRegistry[fullPath] = fmt.Sprintf("%s/%x%s", AttachmentDirName, h.Sum(nil), path.Ext(fullPath))
+			newPath := fmt.Sprintf("%s/%s/%x%s", dir, AttachmentDirName, h.Sum(nil), path.Ext(fullPath))
 			err = os.Rename(fullPath, newPath)
 			if err != nil {
 				return err
@@ -434,7 +434,7 @@ func readPath(dirPath string, category []string, meta []string) (Tree, error) {
 	for _, file := range files {
 		fullPath := path.Join(dirPath, file.Name())
 		if file.IsDir() {
-			if strings.HasPrefix(fullPath, fmt.Sprintf("%s/%s", clearDir, attachmentDirName)) {
+			if strings.HasPrefix(fullPath, fmt.Sprintf("%s/%s", clearDir, AttachmentDirName)) {
 				continue
 			}