Quick answer: When a game saves fine on most devices but not certain ones, it's a device- or platform-specific storage problem: the save path is wrong or inaccessible on that platform, the game lacks write permission, the storage is full or unavailable (removable/managed storage), or it violates platform storage rules. Capture device context to identify the affected devices, then use the correct persistent storage location for each platform and handle write failures gracefully.

A game that won't save on some devices is a frustrating, targeted bug, most players are fine, but a subset can't save at all (or lose progress), because something about their device's storage differs. Storage handling varies significantly across platforms and devices, so a save approach that works on most can fail on specific ones, and the fix is to handle storage correctly per platform and per device condition.

Why Saving Fails on Specific Devices

Storage isn't uniform across devices and platforms, and saving can fail where the game's storage handling doesn't match the device's reality. Causes: wrong or inaccessible save path, the game writes to a location that doesn't exist or isn't writable on that platform/device. Missing permissions, the game lacks storage write permission on that device (especially mobile, where permissions vary). Full or unavailable storage, the device is out of space, or uses removable/managed storage that's absent or inaccessible. And platform storage rules, consoles and some platforms require using specific storage APIs/locations, and not following them means saves fail there.

The pattern, fine on most devices, failing on specific ones, points at these device/platform storage differences. The affected devices share a storage characteristic (a platform, a permission state, a storage configuration) that the game isn't handling.

How to Diagnose It

Capture device context with save-failure reports to find which devices are affected. If failures cluster on a platform (all on a certain OS or device type), it's a platform storage handling issue. If they correlate with storage state (full storage, removable storage), it's a capacity/availability issue. The save error itself (permission denied, path not found, disk full) points at the cause. You need to know which devices fail and how, which device context provides.

Bugnet captures device context, OS, device model, storage-relevant info, with reported issues and crashes, so save failures on specific devices arrive correlated with the device characteristics behind them. Seeing that all save failures are on, say, a particular platform or in a particular storage condition identifies the device-specific storage problem to fix, where a vague 'won't save for some players' would not.

How to Fix It

Use correct per-platform storage and handle failures. Use the proper persistent storage location/API for each platform (don't assume a desktop file path works on console or mobile, follow each platform's storage conventions and requirements). Handle permissions, request and verify storage permission where needed, and handle the case where it's not granted. Handle capacity and availability, check for full or unavailable storage and respond gracefully (tell the player, retry) rather than failing silently or crashing. And follow platform storage rules, especially for console where storage handling is part of certification.

Also handle write failures everywhere (don't fail silently, see silent-save-failure fixes) so a device that can't save at least informs the player rather than losing progress invisibly. After fixing, verify saving works across the previously-failing devices/platforms (or via field data, that save failures on them stop). Correct per-platform storage handling, plus graceful failure handling, is what makes saving reliable across the diverse devices and storage configurations your players use.

Saving fails on some devices due to storage differences, wrong path, missing permissions, full/removable storage, or platform rules. Capture device context to find them, and use correct per-platform storage.