Yeah, I once chased a coffee‑shop clue in Marrakech and had to keep all the receipts, photos, and notes in one place. I set up a little Git repo with a Markdown file for each clue, pushed to GitHub‑Pages, and then used the GitHub Desktop on my phone to sync. On the fly, I also use Notion’s mobile app to jot quick observations, and Google Drive for the PDFs. The trick is to keep everything in one folder, use consistent naming like 2024‑07‑15_city‑name_clue, and set up an encrypted folder with Bitwarden or a local passphrase so you can access it offline. A backup on an external SSD is a lifesaver when Wi‑Fi drops. That’s the routine that kept my case file tight while I moved between cities.