データお預かり - アドレス帳や写真などをバックアップ

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8.19K reviews
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Everyone
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About this app

au's free official backup app!

This app provides peace of mind in case of malfunction, loss, or water damage.

Easily back up your precious memories and data (photos, videos, address book) to a data storage server or SD card.

Data migration when changing devices is also handled by this app.

Data migration between different devices and operating systems, such as from Android to iPhone, is also possible.

Ponta Pass users can use 50GB of storage on the data storage server.

au line contract users (excluding povo and UQ) can use 1GB of storage on the data storage server.

□■ Main functions of the Data Storage App ■□
■ Data storage, saving, and backup
- The following data can be backed up:

Photos/images

Videos

Contact data such as address book

Calendar (schedules, appointments, etc.)

SMS/+Message

au Mail
- You can choose a safe and secure storage location, such as au's data storage server or SD card, for backup.

*SD card functionality is not available on Android 11 and later. Please use a compatible SD card-specific data backup app.

- Newly saved images, videos, address books, and contacts can be automatically backed up by the app.

*Settings are required for use.

- You can check the status of your backed-up storage at any time with a graph.

- Unnecessary data can be easily deleted from within the app.

- au users can use 1GB of storage, and Ponta Pass users can use 50GB.

■ Checking Backed-Up Data
- Backed-up image and video files can be viewed within the app.

- Duplicate photos, images, and similar photos can be automatically found and organized on the data backup server.

■ Recovering/Restoring Data
- Data uploaded to the data backup server can be restored at any time.

- No complicated operations are required when restoring.

- Peace of mind when changing devices, in the unlikely event of data loss, or in the event of device trouble. Data can be easily downloaded and restored.

- Images, photos, and videos can be selected and downloaded individually.
- Data migration from Android to iOS devices such as iPhones, and from iPhones to Android devices, is easy.
- Data can also be copied from an old device to a new one.
■Password Information Management
- Password information, which is often easily forgotten, can be managed with the app.
- Entered information is securely encrypted and stored by au.
- Biometric authentication such as fingerprint authentication and facial recognition can be set up when using the app.
- Writing it down on paper is easy to lose... but you don't have to worry about that if you manage it with the app.
- ID and password information saved in the app can be automatically entered by the app using autocomplete.
*Settings are required for use.

□■ Recommended for people who: ■□
- Want to back up their au smartphone data securely and safely.
- Want to back up important photos, videos, images, phonebook, and other data to prepare for unforeseen circumstances such as accidental drops, water damage, data loss, smartphone malfunction, or loss.
- My smartphone's storage is running low, but I don't want to delete important data; I want to store it on a cloud server.
- I want to transfer data from my old device to my new smartphone when I change models.
- If I back up regularly, I only need to restore when I change models. I want to reduce the hassle of changing models as much as possible.
- When using various services, I can't remember what IDs and passwords I entered, or what accounts I set up. If I write them down on paper, I lose them. Managing passwords and such is troublesome.
- I want to copy data that I want to transfer from my old device to my new device.
- For those who have used the au backup app.

□■ Notes ■□
- In principle, an au ID is required to use this service (an au ID is not required for backup and restore to an SD card).
- Please use this app after reviewing the terms of service and privacy policy.

Terms of Service
https://terms.data-storage.auone.jp/terms/datastorage_terms.html
Privacy Policy
https://www.kddi.com/app-policy/android/app-policy-abst-dataoazukari-1.0.html
*Please note that the items that can be backed up and restored may vary depending on the environment, such as the source device, the destination device, and the OS status.
You can easily back up your smartphone's photos, videos, address book and other data.
Updated on
Jun 22, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Location, Personal info and 7 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

7.92K reviews
AHMAD HAMDI ABDUL MAJID (Azdz7)
August 24, 2020
Not in global languages .pls be update its or upgrade.
111 people found this review helpful
Remie Ug
April 5, 2024
How can I remove this thing from my phone, I don't understand the language at least improvise an alternative way to switch languages
18 people found this review helpful
Corinne Lusigi
November 6, 2025
please give the option of using it in English
13 people found this review helpful

What’s new

いつもデータお預かりアプリをご利用いただきありがとうございます。

【バージョン15.103.03の変更点】
・軽微な不具合を修正しました
Content rating
Everyone
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App support

About the developer
KDDI CORPORATION
kddideveloper.gplay@gmail.com
2-3-2, NISHISHINJUKU KDDI BLDG. SHINJUKU-KU, 東京都 160-0023 Japan
+81 80-5078-9238

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