· The alarm pictures received by the APP will be saved locally on the phone after opening the preview, [Clear cache] can delete the alarm messages cached in the phone to free up memory space
· The user can select [Clear cache] in the [Profile]-[Settings] interface, and select the time period for clearing
a. Only clear the last 7 days
b. Only save the last 7 days
c. All
Note: After clearing the cache, preview the alarm picture again, and the picture will be saved locally on the phone again
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