Reasons why the file has expired or been cleared:
1. WeChat failed to download immediately;
2. WeChat cache files have been cleared.
It may be that you cleaned up the previous files when cleaning up WeChat chat data, or it may be that when you used anti-virus software to clean up junk, the cached files in WeChat were cleaned up as files occupying memory.
Solution:
1. Log in again
Exit WeChat first, and then log in again.
2. Migrate chat records
WeChat has a function to migrate chat records. Open WeChat and click [Me]-[Settings]-[General] 】-[Chat record migration], choose to upload your chat records, and then find a good network environment to download the chat records and try.
3. Apple Recovery Master software
Apple Recovery Master has three modes for users to choose from. If you want to restore chat records, click [WeChat Chat Records] icon; if you want to recover pictures, files and other data in WeChat, select [WeChat Attachment] to scan.
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