Terms of Service

Last updated: May 29, 2026

Please read these Terms of Service ("Terms") carefully before using the 3DSync homebrew application for Nintendo 3DS or the accompanying web-based configurator at https://vllni.github.io/3DSync/ (collectively, the "Service"). By downloading, installing, or otherwise using the Service you agree to be bound by these Terms. If you do not agree, do not use the Service.

1. Description of the Service

3DSync is a free, open-source homebrew utility that synchronises files between a Nintendo 3DS SD card and a user-configured cloud storage account (Google Drive or Dropbox). The web configurator assists in generating the required configuration file. The Service is provided free of charge and on an open-source basis under the licence contained in the project repository.

2. Eligibility

You must be at least 13 years old to use the Service. By using the Service you represent that you meet this requirement. If you are under the age of majority in your jurisdiction, you represent that a parent or legal guardian has reviewed and agreed to these Terms on your behalf.

3. Your Responsibilities

You are solely responsible for maintaining backup copies of all files you choose to sync.
You are solely responsible for the security of your cloud storage credentials, OAuth tokens, and the 3DSync.ini configuration file.
You must comply with the terms of service of any third-party platform you connect to the Service (including Google's and Dropbox's terms).
You must not use the Service to sync content that infringes third-party intellectual property rights or violates any applicable law.
You use the Service on modified ("hacked") Nintendo hardware entirely at your own risk and acknowledge that such use may void warranties or violate the hardware manufacturer's terms.

4. Disclaimer of Warranties

THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE DEVELOPER EXPRESSLY DISCLAIMS ALL WARRANTIES, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND NON-INFRINGEMENT. THE DEVELOPER DOES NOT WARRANT THAT THE SERVICE WILL BE ERROR-FREE, UNINTERRUPTED, SECURE, OR THAT ANY DEFECTS WILL BE CORRECTED. THE DEVELOPER DOES NOT WARRANT THAT THE SERVICE WILL PRODUCE ACCURATE OR COMPLETE RESULTS, OR THAT FILES WILL BE TRANSFERRED, PRESERVED, OR RESTORED WITHOUT LOSS OR CORRUPTION.

In particular, and without limiting the foregoing, the developer makes no representations or warranties regarding:

the continued availability or correct operation of Google Drive, Dropbox, or any other third-party service integrated with 3DSync;
the accuracy of bidirectional sync, conflict resolution, or any file-comparison logic;
the suitability of the Service for backing up or archiving irreplaceable data;
compatibility with any particular firmware version, hardware revision, or operating system.

5. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL THE DEVELOPER, ANY CONTRIBUTOR, OR ANY AFFILIATED PARTY BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, PUNITIVE, OR EXEMPLARY DAMAGES WHATSOEVER, INCLUDING BUT NOT LIMITED TO DAMAGES FOR LOSS OF DATA, LOSS OF FILES, LOSS OF PROFITS, LOSS OF GOODWILL, BUSINESS INTERRUPTION, OR COST OF SUBSTITUTE GOODS OR SERVICES, ARISING OUT OF OR IN CONNECTION WITH THE USE OR INABILITY TO USE THE SERVICE, EVEN IF THE DEVELOPER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

Without limiting the above, the developer's total cumulative liability to you for all claims arising out of or relating to the Service, regardless of the form of action, shall not exceed zero euros (€0), reflecting the fact that the Service is provided entirely free of charge.

Some jurisdictions do not allow the exclusion of certain warranties or the limitation of certain damages. To the extent that applicable law does not permit the full exclusions and limitations set out above, those exclusions and limitations apply to the maximum extent permitted by law.

6. Data Loss — Specific Acknowledgement

You expressly acknowledge and agree that file-synchronisation software carries an inherent risk of data loss or corruption, including but not limited to: accidental overwriting of files, incorrect conflict resolution, deletion propagation, incomplete transfers due to network interruption, and bugs in the application logic. You are solely responsible for maintaining independent backups of any data you choose to sync with 3DSync. The developer shall have no liability whatsoever for any loss or corruption of data, howsoever caused, arising from use of the Service.

7. Third-Party Services

The Service integrates with Google Drive and Dropbox. Your use of those platforms is governed exclusively by their respective terms of service and privacy policies. The developer has no control over, and assumes no responsibility for, the availability, reliability, accuracy, or conduct of any third-party service. The developer is not responsible for any loss of data held on third-party platforms.

8. Open-Source Licence

The 3DSync source code is made available under the licence contained in the project repository (LICENSE). These Terms of Service govern your use of the Service as a whole; in the event of a conflict between the open-source licence and these Terms regarding source code usage, the open-source licence prevails.

9. Modifications to the Service and These Terms

The developer reserves the right to modify, suspend, or discontinue the Service (or any part of it) at any time without notice and without liability. The developer may also update these Terms at any time; the "Last updated" date at the top of this page will reflect any changes. Your continued use of the Service after any modification constitutes acceptance of the updated Terms.

10. Governing Law and Dispute Resolution

These Terms shall be governed by and construed in accordance with the laws of Germany, without regard to conflict-of-law principles. Any dispute arising out of or in connection with these Terms shall be subject to the exclusive jurisdiction of the competent courts of Germany, unless mandatory consumer-protection laws in your country of residence grant you the right to bring proceedings in your local courts, in which case that right is unaffected.

11. Severability

If any provision of these Terms is held to be invalid, illegal, or unenforceable, that provision shall be modified to the minimum extent necessary to make it enforceable, or severed if modification is not possible, and the remaining provisions shall continue in full force and effect.

12. Entire Agreement

These Terms, together with the Privacy Policy, constitute the entire agreement between you and the developer with respect to the Service and supersede all prior or contemporaneous communications and proposals, whether oral or written.

13. Contact

Questions about these Terms can be directed to the developer via GitHub Issues.