As far as your questions:
1) Yes, MobileSheets has to have a local copy of every file in the library, so it downloads the file off the cloud and places it in the storage location.
2) By default, yes it will get copied to the storage location listed under Settings->Storage->Set the MobileSheets Storage Location. If you uncheck "Let MobileSheets Manage my Files" (which is only available on Android), then MobileSheets will use your files from their original location, meaning no copy will be made. If the files are copied into the storage location, then yes, you can delete them after they are imported. This is an option in the storage settings to automatically do this if it fits your workflow.
3) Yes, it is very sensitive to folder structures and filenames. In fact, this not designed to allow you to manage the files/folders on the cloud yourself. MobileSheets must manage all of the files in the cloud sync folder and you should not edit them in any way, or it will break the next sync you perform. This is different than a standard file sync as MobileSheets actually has a complete copy of the library in the cloud (including the database) so that it can handle merging differences between multiple devices. In the future I may implement a simple sync feature that is akin to a file sync, but for now, it does not operate that way.
Mike
1) Yes, MobileSheets has to have a local copy of every file in the library, so it downloads the file off the cloud and places it in the storage location.
2) By default, yes it will get copied to the storage location listed under Settings->Storage->Set the MobileSheets Storage Location. If you uncheck "Let MobileSheets Manage my Files" (which is only available on Android), then MobileSheets will use your files from their original location, meaning no copy will be made. If the files are copied into the storage location, then yes, you can delete them after they are imported. This is an option in the storage settings to automatically do this if it fits your workflow.
3) Yes, it is very sensitive to folder structures and filenames. In fact, this not designed to allow you to manage the files/folders on the cloud yourself. MobileSheets must manage all of the files in the cloud sync folder and you should not edit them in any way, or it will break the next sync you perform. This is different than a standard file sync as MobileSheets actually has a complete copy of the library in the cloud (including the database) so that it can handle merging differences between multiple devices. In the future I may implement a simple sync feature that is akin to a file sync, but for now, it does not operate that way.
Mike