How to fix storage/object-not-found: No object exists at specified reference in Firebase

// Correct - no leading slash
const correctRef = ref(storage, "users/123/profile.jpg");

// Incorrect - leading slash creates different path
const incorrectRef = ref(storage, "/users/123/profile.jpg");

import { getStorage, ref, getDownloadURL } from "firebase/storage";

const storage = getStorage();
const fileRef = ref(storage, "images/photo.jpg");

console.log("Full path:", fileRef.fullPath);
console.log("Bucket:", fileRef.bucket);

try {
  const url = await getDownloadURL(fileRef);
  console.log("Success:", url);
} catch (error) {
  console.error("Error accessing file:", error.code, error.message);
  console.error("Attempted path:", fileRef.fullPath);
}

import { getStorage, ref, listAll } from "firebase/storage";

const storage = getStorage();
const listRef = ref(storage, "users/123");

try {
  const result = await listAll(listRef);
  
  console.log("Files in directory:");
  result.items.forEach((itemRef) => {
    console.log("  -", itemRef.fullPath);
  });
  
  console.log("\nSubdirectories:");
  result.prefixes.forEach((folderRef) => {
    console.log("  -", folderRef.fullPath);
  });
} catch (error) {
  console.error("Error listing files:", error);
}

import { getStorage, ref, uploadBytes, getDownloadURL } from "firebase/storage";

const storage = getStorage();
const fileRef = ref(storage, "uploads/document.pdf");

async function uploadAndGetURL(file) {
  try {
    // Wait for upload to complete
    const snapshot = await uploadBytes(fileRef, file);
    console.log("Upload successful:", snapshot.metadata.fullPath);
    
    // Now safe to get download URL
    const downloadURL = await getDownloadURL(fileRef);
    console.log("Download URL:", downloadURL);
    
    return downloadURL;
  } catch (error) {
    console.error("Upload or URL retrieval failed:", error);
    throw error;
  }
}

import { uploadBytesResumable, getDownloadURL } from "firebase/storage";

const uploadTask = uploadBytesResumable(fileRef, file);

uploadTask.on("state_changed",
  (snapshot) => {
    const progress = (snapshot.bytesTransferred / snapshot.totalBytes) * 100;
    console.log("Upload is " + progress + "% done");
  },
  (error) => {
    console.error("Upload failed:", error);
  },
  async () => {
    // Upload completed successfully
    const downloadURL = await getDownloadURL(uploadTask.snapshot.ref);
    console.log("File available at:", downloadURL);
  }
);

// Example: Allow authenticated users to read their own files
rules_version = '2';
service firebase.storage {
  match /b/{bucket}/o {
    match /users/{userId}/{allPaths=**} {
      allow read: if request.auth != null && request.auth.uid == userId;
      allow write: if request.auth != null && request.auth.uid == userId;
    }
  }
}

// Allow public read access - USE ONLY FOR TESTING
rules_version = '2';
service firebase.storage {
  match /b/{bucket}/o {
    match /{allPaths=**} {
      allow read: if true;
      allow write: if request.auth != null;
    }
  }
}

import { getStorage, ref } from "firebase/storage";

// Default bucket
const defaultStorage = getStorage();

// Specific bucket
const customStorage = getStorage(app, "gs://my-other-bucket.appspot.com");

// Create reference in the correct bucket
const fileRef = ref(customStorage, "path/to/file.jpg");