关于Firebase Storage自动生成.overall_export_metadata及日期命名文件夹的疑问

Hey there! Let's unpack your questions about those confusing timestamped folders in Firebase Cloud Storage.

First up: Does Firebase automatically create these folders?
Nope, Firebase Cloud Storage doesn't generate these timestamped export folders on its own. The most likely explanation is that you (or someone with access to your project) triggered an export operation at some point—maybe via the Firebase Console, Cloud SDK, a script you wrote and forgot about, or even a Cloud Function that handled backups. Since you don't remember doing an import, this was probably an export of your bucket's contents (the timestamp naming pattern lines up with how export operations label their output folders). And you're correct that these have nothing to do with Firestore's Point-in-Time Recovery (PITR) feature, since PITR isn't available for Cloud Storage.

Next: Is it safe to delete them?
In most cases, yes—if you don't need the exported data anymore, feel free to delete these folders. But before you do, take a quick look at the .overall_export_metadata file inside the timestamped folder. This file will have details like when the export ran, what data was included, and the source bucket. If it's just a backup of old project files you no longer need, deleting it won't affect your active Storage setup. Just make sure you're not accidentally removing any active app data (these export folders are almost always separate from your main storage structure, so the risk is low, but a quick check never hurts!).

备注：内容来源于stack exchange，提问作者Bitwise DEVS