diff --git a/files_webdav.go b/files_webdav.go
new file mode 100644
index 0000000..f3fcafd
--- /dev/null
+++ b/files_webdav.go
@@ -0,0 +1,421 @@
+package onlyoffice
+
+// WebDAV-oriented Files operations. These expose the Documents module through
+// value types and cover everything needed to back a filesystem mapping:
+// listing (including the virtual @root sections), folder/file CRUD, move/copy,
+// and streaming upload/download. They are intentionally small and dependency
+// free (only net/http), so callers are not forced to import heavier parts of
+// the library.
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"mime/multipart"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// DavFolder is a folder row from the Files module.
+type DavFolder struct {
+	ID           string
+	Title        string
+	ParentID     string
+	RootType     int // 1=Common, 3=Trash, 5=My, 6=Share, 8=Projects, ...
+	FilesCount   int
+	FoldersCount int
+	Access       int
+	Shared       bool
+	Updated      string
+}
+
+// DavFile is a file row from the Files module.
+type DavFile struct {
+	ID      string
+	Title   string
+	Size    int64
+	Updated string
+	ViewURL string
+}
+
+// DavListing is the contents of one folder.
+type DavListing struct {
+	Current DavFolder
+	Files   []DavFile
+	Folders []DavFolder
+}
+
+// ListDavFolder returns the contents of a folder by id, which may be a
+// symbolic root such as "@my". For "@root" use ListDavSections.
+func (c *Client) ListDavFolder(ctx context.Context, id string) (*DavListing, error) {
+	raw, err := c.getJSON(ctx, "/api/2.0/files/"+url.PathEscape(id))
+	if err != nil {
+		return nil, err
+	}
+	resp, err := responseField(raw, "response")
+	if err != nil {
+		return nil, err
+	}
+	// @root returns an array with a single blob; a normal folder returns an
+	// object. Normalize both.
+	if len(resp) > 0 && resp[0] == '[' {
+		var arr []*DavListing
+		if err := json.Unmarshal(resp, &arr); err != nil {
+			return nil, err
+		}
+		if len(arr) == 0 {
+			return &DavListing{}, nil
+		}
+		return arr[0], nil
+	}
+	var l DavListing
+	if err := json.Unmarshal(resp, &l); err != nil {
+		return nil, err
+	}
+	return &l, nil
+}
+
+// ListDavSections returns the virtual top-level sections shown by @root
+// ("In projects", "My documents", "Shared with me", "Common", "Favorites",
+// "Recent", "Trash"). Each is the `current` folder of one @root element.
+func (c *Client) ListDavSections(ctx context.Context) ([]DavFolder, error) {
+	raw, err := c.getJSON(ctx, "/api/2.0/files/@root")
+	if err != nil {
+		return nil, err
+	}
+	resp, err := responseField(raw, "response")
+	if err != nil {
+		return nil, err
+	}
+	var arr []struct {
+		Current DavFolder `json:"current"`
+	}
+	if err := json.Unmarshal(resp, &arr); err != nil {
+		// Tolerate a non-array (single listing) response.
+		var single DavListing
+		if err2 := json.Unmarshal(resp, &single); err2 != nil {
+			return nil, err
+		}
+		return []DavFolder{single.Current}, nil
+	}
+	sections := make([]DavFolder, 0, len(arr))
+	for i := range arr {
+		sections = append(sections, arr[i].Current)
+	}
+	return sections, nil
+}
+
+// CreateDavFolder creates a folder titled title inside parentID.
+func (c *Client) CreateDavFolder(ctx context.Context, parentID, title string) (*DavFolder, error) {
+	raw, err := c.postJSON(ctx, "/api/2.0/files/folder/"+url.PathEscape(parentID),
+		map[string]string{"title": title})
+	if err != nil {
+		return nil, err
+	}
+	var env struct {
+		Response *DavFolder `json:"response"`
+	}
+	if err := json.Unmarshal(raw, &env); err != nil {
+		return nil, err
+	}
+	if env.Response == nil {
+		return nil, fmt.Errorf("onlyoffice: empty create-folder response")
+	}
+	return env.Response, nil
+}
+
+// RenameDavFolder renames a folder.
+func (c *Client) RenameDavFolder(ctx context.Context, id, title string) error {
+	_, err := c.putJSON(ctx, "/api/2.0/files/folder/"+url.PathEscape(id),
+		map[string]string{"title": title})
+	return err
+}
+
+// RenameDavFile renames a file (title includes the extension).
+func (c *Client) RenameDavFile(ctx context.Context, id, title string) error {
+	_, err := c.putJSON(ctx, "/api/2.0/files/file/"+url.PathEscape(id),
+		map[string]string{"title": title})
+	return err
+}
+
+// MoveDavItems moves the given folders and/or files into destFolderID.
+func (c *Client) MoveDavItems(ctx context.Context, folderIDs, fileIDs []string, destFolderID string) error {
+	_, err := c.putJSON(ctx, "/api/2.0/files/fileops/move", map[string]any{
+		"folderIds":    nums(folderIDs),
+		"fileIds":      nums(fileIDs),
+		"destFolderId": num(destFolderID),
+		"resolveType":  "Skip",
+		"holdResult":   true,
+	})
+	return err
+}
+
+// CopyDavItems copies the given folders and/or files into destFolderID.
+func (c *Client) CopyDavItems(ctx context.Context, folderIDs, fileIDs []string, destFolderID string) error {
+	_, err := c.putJSON(ctx, "/api/2.0/files/fileops/copy", map[string]any{
+		"folderIds":           nums(folderIDs),
+		"fileIds":             nums(fileIDs),
+		"destFolderId":        num(destFolderID),
+		"conflictResolveType": "Skip",
+		"deleteAfter":         true,
+	})
+	return err
+}
+
+// DeleteDavItems deletes the given folders and/or files.
+func (c *Client) DeleteDavItems(ctx context.Context, folderIDs, fileIDs []string) error {
+	body := map[string]any{"DeleteAfter": true, "Immediately": false}
+	for _, id := range folderIDs {
+		if _, err := c.deleteJSON(ctx, "/api/2.0/files/folder/"+url.PathEscape(id), body); err != nil {
+			return err
+		}
+	}
+	for _, id := range fileIDs {
+		if _, err := c.deleteJSON(ctx, "/api/2.0/files/file/"+url.PathEscape(id), body); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// UploadDavFile uploads src (fileName) into folderID, streaming from src.
+func (c *Client) UploadDavFile(ctx context.Context, folderID, fileName string, src io.Reader) (*DavFile, error) {
+	raw, err := c.uploadReader(ctx, "/api/2.0/files/"+url.PathEscape(folderID)+"/upload", "file", fileName, src)
+	if err != nil {
+		return nil, err
+	}
+	var env struct {
+		Response *DavFile `json:"response"`
+	}
+	if err := json.Unmarshal(raw, &env); err != nil {
+		return nil, err
+	}
+	if env.Response == nil {
+		return nil, fmt.Errorf("onlyoffice: empty upload response")
+	}
+	return env.Response, nil
+}
+
+// DownloadDavFile streams the file identified by id to w, returning bytes copied.
+func (c *Client) DownloadDavFile(ctx context.Context, id string, w io.Writer) (int64, error) {
+	file, err := c.GetFile(ctx, id)
+	if err != nil {
+		return 0, err
+	}
+	if file.ViewURL == nil || *file.ViewURL == "" {
+		return 0, fmt.Errorf("onlyoffice: file %s has no viewUrl", id)
+	}
+	u := c.resolveAPIURL(*file.ViewURL)
+	auth, err := c.authHeader()
+	if err != nil {
+		return 0, err
+	}
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, u, nil)
+	if err != nil {
+		return 0, err
+	}
+	req.Header.Set("Authorization", auth)
+	resp, err := c.client.Do(req)
+	if err != nil {
+		return 0, err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 400 {
+		return 0, fmt.Errorf("onlyoffice: download: %d", resp.StatusCode)
+	}
+	return io.Copy(w, resp.Body)
+}
+
+// --- internal helpers -------------------------------------------------------
+
+// deleteJSON performs an authenticated DELETE with an optional JSON body.
+func (c *Client) deleteJSON(ctx context.Context, path string, body any) (json.RawMessage, error) {
+	var reader io.Reader
+	if body != nil {
+		buf, err := json.Marshal(body)
+		if err != nil {
+			return nil, err
+		}
+		reader = bytes.NewReader(buf)
+	}
+	auth, err := c.authHeader()
+	if err != nil {
+		return nil, err
+	}
+	req, err := http.NewRequestWithContext(ctx, http.MethodDelete, c.baseURL()+path, reader)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Authorization", auth)
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Accept", "application/json")
+	resp, err := c.client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	raw, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+	if resp.StatusCode >= 400 {
+		return nil, fmt.Errorf("DELETE %s: %d %s", path, resp.StatusCode, truncate(string(raw), 400))
+	}
+	return raw, nil
+}
+
+// uploadReader uploads a stream to path under the given form field name.
+func (c *Client) uploadReader(ctx context.Context, path, fieldName, fileName string, src io.Reader) (json.RawMessage, error) {
+	var buf bytes.Buffer
+	mw := multipart.NewWriter(&buf)
+	part, err := mw.CreateFormFile(fieldName, fileName)
+	if err != nil {
+		return nil, err
+	}
+	if _, err := io.Copy(part, src); err != nil {
+		return nil, err
+	}
+	if err := mw.Close(); err != nil {
+		return nil, err
+	}
+	auth, err := c.authHeader()
+	if err != nil {
+		return nil, err
+	}
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, c.baseURL()+path, &buf)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Authorization", auth)
+	req.Header.Set("Content-Type", mw.FormDataContentType())
+	req.Header.Set("Accept", "application/json")
+	resp, err := c.client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	raw, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+	if resp.StatusCode >= 400 {
+		return nil, fmt.Errorf("upload %s: %d %s", path, resp.StatusCode, truncate(string(raw), 400))
+	}
+	return raw, nil
+}
+
+func nums(ids []string) []json.Number {
+	out := make([]json.Number, 0, len(ids))
+	for _, id := range ids {
+		if _, err := strconv.Atoi(id); err == nil {
+			out = append(out, json.Number(id))
+		}
+	}
+	return out
+}
+
+func num(id string) any {
+	if _, err := strconv.Atoi(id); err == nil {
+		return json.Number(id)
+	}
+	return id
+}
+
+// UnmarshalJSON decodes a folder from the portal envelope, including fields
+// that the base FolderEntry omits (parentId, rootFolderType, access, ...).
+func (f *DavFolder) UnmarshalJSON(b []byte) error {
+	var raw struct {
+		ID           *json.Number `json:"id"`
+		Title        *string      `json:"title"`
+		ParentID     *json.Number `json:"parentId"`
+		RootType     *int         `json:"rootFolderType"`
+		FilesCount   *int         `json:"filesCount"`
+		FoldersCount *int         `json:"foldersCount"`
+		Access       *int         `json:"access"`
+		Shared       *bool        `json:"shared"`
+		Updated      *string      `json:"updated"`
+	}
+	if err := json.Unmarshal(b, &raw); err != nil {
+		return err
+	}
+	if raw.ID != nil {
+		f.ID = raw.ID.String()
+	}
+	if raw.Title != nil {
+		f.Title = *raw.Title
+	}
+	if raw.ParentID != nil {
+		f.ParentID = raw.ParentID.String()
+	}
+	if raw.RootType != nil {
+		f.RootType = *raw.RootType
+	}
+	if raw.FilesCount != nil {
+		f.FilesCount = *raw.FilesCount
+	}
+	if raw.FoldersCount != nil {
+		f.FoldersCount = *raw.FoldersCount
+	}
+	if raw.Access != nil {
+		f.Access = *raw.Access
+	}
+	if raw.Shared != nil {
+		f.Shared = *raw.Shared
+	}
+	if raw.Updated != nil {
+		f.Updated = *raw.Updated
+	}
+	return nil
+}
+
+// UnmarshalJSON decodes a file row, capturing size and timestamps.
+func (f *DavFile) UnmarshalJSON(b []byte) error {
+	var raw struct {
+		ID        *json.Number `json:"id"`
+		Title     *string      `json:"title"`
+		PureSize  *int64       `json:"pureContentLength"`
+		SizeStr   *string      `json:"contentLength"`
+		Updated   *string      `json:"updated"`
+		ViewURL   *string      `json:"viewUrl"`
+	}
+	if err := json.Unmarshal(b, &raw); err != nil {
+		return err
+	}
+	if raw.ID != nil {
+		f.ID = raw.ID.String()
+	}
+	if raw.Title != nil {
+		f.Title = *raw.Title
+	}
+	if raw.PureSize != nil {
+		f.Size = *raw.PureSize
+	} else if raw.SizeStr != nil {
+		if n, err := strconv.ParseInt(strings.Fields(*raw.SizeStr)[0], 10, 64); err == nil {
+			f.Size = n
+		}
+	}
+	if raw.Updated != nil {
+		f.Updated = *raw.Updated
+	}
+	if raw.ViewURL != nil {
+		f.ViewURL = *raw.ViewURL
+	}
+	return nil
+}
+
+// ModTime parses the folder's updated timestamp.
+func (f *DavFolder) ModTime() time.Time {
+	t, _ := time.Parse("2006-01-02T15:04:05.0000000-07:00", f.Updated)
+	return t
+}
+
+// ModTime parses the file's updated timestamp.
+func (f *DavFile) ModTime() time.Time {
+	t, _ := time.Parse("2006-01-02T15:04:05.0000000-07:00", f.Updated)
+	return t
+}