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Importer (gamelist/launchbox file:// flows) and exporters (gamelist.xml, metadata.pegasus.txt local exports) now hardlink media assets when source and destination share a filesystem, falling back transparently to a copy on EXDEV / EPERM / EOPNOTSUPP / EMLINK / EACCES (cross-device, FAT32, exFAT, network mounts, etc.). Saves disk space and is effectively instantaneous on large files (videos, manuals, miximages). Covers keep a real copy (allow_link=False) because _store_cover resizes the small cover in place via PIL.Image.save, which would truncate the shared inode and corrupt the user's source image. Also makes FSSyncHandler tolerate a missing/unwritable /romm/sync at startup: an OSError from mkdir now logs a warning instead of crashing the whole app at module-import time. Sync calls still fail at use time if the mount remains broken — the right place to surface the error. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>