diff --git a/cmd/piwigo-cli/images_list.go b/cmd/piwigo-cli/images_list.go
index 04aae67..1626005 100644
--- a/cmd/piwigo-cli/images_list.go
+++ b/cmd/piwigo-cli/images_list.go
@@ -5,10 +5,10 @@ import (
 	"net/url"
 	"path/filepath"
 	"regexp"
-	"strings"
 
 	"github.com/celogeek/piwigo-cli/internal/piwigo"
 	"github.com/celogeek/piwigo-cli/internal/piwigo/piwigotools"
+	"github.com/celogeek/piwigo-cli/internal/tree"
 	"github.com/schollz/progressbar/v3"
 )
 
@@ -51,7 +51,7 @@ func (c *ImagesListCommand) Execute(args []string) error {
 		if !ok {
 			return fmt.Errorf("category doesn't exists")
 		}
-		rootCatName = rootCat.Name + " / "
+		rootCatName = rootCat.Name
 	}
 
 	filter := regexp.MustCompile("")
@@ -59,7 +59,7 @@ func (c *ImagesListCommand) Execute(args []string) error {
 		filter = regexp.MustCompile("(?i)" + c.Filter)
 	}
 
-	rootTree := piwigotools.NewTree()
+	rootTree := tree.New()
 
 	bar := progressbar.Default(1, "listing")
 	for page := 0; ; page++ {
@@ -80,9 +80,11 @@ func (c *ImagesListCommand) Execute(args []string) error {
 
 		for _, image := range resp.Images {
 			for _, cat := range image.Categories {
-				filename := filepath.Join(
-					strings.ReplaceAll(categories[cat.Id].Name[len(rootCatName):], " / ", "/"),
-					image.Filename,
+				filename, _ := filepath.Rel(rootCatName,
+					filepath.Join(
+						categories[cat.Id].Name,
+						image.Filename,
+					),
 				)
 				if !filter.MatchString(filename) {
 					continue
diff --git a/internal/piwigo/categories.go b/internal/piwigo/categories.go
index 1982833..575a8ff 100644
--- a/internal/piwigo/categories.go
+++ b/internal/piwigo/categories.go
@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"net/url"
+	"strings"
 
 	"github.com/celogeek/piwigo-cli/internal/piwigo/piwigotools"
 )
@@ -21,22 +22,25 @@ func (p *Piwigo) Categories() (piwigotools.Categories, error) {
 	}, &result); err != nil {
 		return nil, err
 	}
+	for _, category := range result.Categories {
+		category.Name = strings.ReplaceAll(category.Name, " / ", "/")
+	}
 	return result.Categories, nil
 }
 
-func (p *Piwigo) CategoryFromId() (map[int]piwigotools.Category, error) {
+func (p *Piwigo) CategoryFromId() (map[int]*piwigotools.Category, error) {
 	categories, err := p.Categories()
 	if err != nil {
 		return nil, err
 	}
-	result := map[int]piwigotools.Category{}
+	result := map[int]*piwigotools.Category{}
 	for _, category := range categories {
 		result[category.Id] = category
 	}
 	return result, nil
 }
 
-func (p *Piwigo) CategoryFromName(catId int) (map[string]piwigotools.Category, error) {
+func (p *Piwigo) CategoryFromName(catId int) (map[string]*piwigotools.Category, error) {
 	var results CategoriesResult
 
 	err := p.Post("pwg.categories.getList", &url.Values{
@@ -46,13 +50,14 @@ func (p *Piwigo) CategoryFromName(catId int) (map[string]piwigotools.Category, e
 		return nil, err
 	}
 
-	categoriesId := map[string]piwigotools.Category{}
+	categoriesId := map[string]*piwigotools.Category{}
 	ok := false
 	for _, category := range results.Categories {
 		switch category.Id {
 		case catId:
 			ok = true
 		default:
+			category.Name = strings.ReplaceAll(category.Name, " / ", "/")
 			categoriesId[category.Name] = category
 		}
 	}
diff --git a/internal/piwigo/files.go b/internal/piwigo/files.go
index 15f5350..041bb2f 100644
--- a/internal/piwigo/files.go
+++ b/internal/piwigo/files.go
@@ -178,7 +178,7 @@ func (p *Piwigo) ScanTree(
 			dirname := norm.NFC.String(dir.Name())
 			category, ok := categoryFromName[dirname]
 			if !ok {
-				category = piwigotools.Category{}
+				category = &piwigotools.Category{}
 				p.mu.Lock()
 				err = p.Post("pwg.categories.add", &url.Values{
 					"name":   []string{strings.ReplaceAll(dirname, "'", `\'`)},
diff --git a/internal/piwigo/piwigotools/categories.go b/internal/piwigo/piwigotools/categories.go
index d10e03d..4c0ea34 100644
--- a/internal/piwigo/piwigotools/categories.go
+++ b/internal/piwigo/piwigotools/categories.go
@@ -1,6 +1,6 @@
 package piwigotools
 
-type Categories []Category
+type Categories []*Category
 
 type Category struct {
 	Id          int    `json:"id"`
diff --git a/internal/piwigo/piwigotools/tree.go b/internal/tree/tree.go
similarity index 97%
rename from internal/piwigo/piwigotools/tree.go
rename to internal/tree/tree.go
index c66aaaa..f4f07c0 100644
--- a/internal/piwigo/piwigotools/tree.go
+++ b/internal/tree/tree.go
@@ -1,4 +1,4 @@
-package piwigotools
+package tree
 
 import (
 	"path/filepath"
@@ -13,17 +13,17 @@ type Tree interface {
 	TreeView() chan string
 }
 
-type node struct {
-	Name  string
-	Nodes map[string]*node
-}
-
-func NewTree() Tree {
+func New() Tree {
 	return &node{
 		Name: ".",
 	}
 }
 
+type node struct {
+	Name  string
+	Nodes map[string]*node
+}
+
 func (t *node) Add(name string) Tree {
 	if t.Nodes == nil {
 		t.Nodes = map[string]*node{}