NII FileSender is scheduled to undergo a major system update (migration from version 2.x to version 3.x). The new version 3.x system is built and operated entirely separately from the current version 2.x system, and files cannot be transferred between the two versions.
Starting December 1, 2026, new file uploads to version 2.x will no longer be possible. In addition, users accessing the existing NII FileSender URL(https://filesender.nii.ac.jp/) will be redirected to the new version 3.x URL (https://filesender.nii.ac.jp/3/).
Since uploaded files can be retained for a maximum of 20 days, please use version 3.x when transferring files or creating folders to receive files through NII FileSender after November 10, 2026, ahead of the migration starting on December 1, 2026. Version 3.x is available at the new version 3.x URL.
Please note that the version 2.x system will be discontinued and will no longer be accessible after December 30, 2026.
For more details about the changes, please refer to the official documentation(in Japanese).