Gokapi

A lightweight file sharing server written in Go that hands out links to files which expire automatically after a set number of days or downloads. Uploads are limited to authenticated accounts by default, identical files are stored only once, links can be password protected, the interface can be restyled with custom CSS, and an API and CLI cover scripted uploads.

Teams use it to send a contract or a log file and have it disappear afterwards instead of accumulating in an inbox.

Run on your own infrastructure, the temporary shares and the files behind them remain on infrastructure you control, so your retention rules come from your own disk rather than a third party policy.