Exercise 2: A "Keep on This Device" File Needs Downloading Again — Possible Solution ==================================================================== WHAT MOST LIKELY HAPPENED ------------------------------ Per this chapter's own finding-box, "Storage Sense can automatically convert locally available OneDrive files back into cloud-only placeholders if they haven't been opened recently... A file explicitly downloaded, or even one manually marked 'Always keep on this device,' can still be affected unless that setting is genuinely respected by the configured Storage Sense policy." The most likely explanation is that Storage Sense's own scheduled cleanup ran, treated the file as infrequently accessed since it hadn't been opened in a while, and converted it back into a cloud-only placeholder - despite the user having set "Always keep on this device" in Chapter 3. WHY THE ORIGINAL "KEEP ON THIS DEVICE" SETTING DIDN'T FULLY PROTECT IT ------------------------------ This chapter explicitly flags that a file marked to stay local "can still be affected unless that setting is genuinely respected by the configured Storage Sense policy" - meaning the protection isn't absolute the way it might reasonably be assumed to be. Depending on the specific Storage Sense configuration in effect, its own automated cleanup behavior can override or bypass the earlier per-file decision rather than treating it as a permanent exception. WHY THIS IS A REAL, NOT HYPOTHETICAL, GOTCHA ------------------------------ This is precisely why this chapter frames it as something "worth checking directly if a previously-available file mysteriously needs an internet connection to open again" - the exact symptom in this exercise. The surprise isn't a malfunction; it's Storage Sense doing its job as configured, just in a way that quietly reversed an earlier, seemingly permanent user decision. WHAT TO DO ABOUT IT ------------------------------ Per this chapter, the fix is to check the file's current OneDrive status directly (Chapter 3's own "Free up space" vs. "Always keep on this device" check) and review the Storage Sense configuration itself in Settings > System > Storage, since the automated policy - not a bug - is what silently reversed the earlier setting. WHY THIS WORKS AS AN ANSWER ------------------------------ It names Storage Sense's own automatic cloud-only conversion as the specific cause using this chapter's own finding-box, explains why the earlier "keep on this device" setting didn't guarantee permanent protection, and gives the concrete next step (checking the file's current status and the Storage Sense policy) rather than treating the surprise as unexplained.