It is showing the total number of items or files or folders present in the Samsung Files . It will not show individually.

Please reset the Bluetooth settings to default from settings

Dear Bhavya Joshi please visit the nearest authorised Samsung Service Centre with your receipt copy of the purchasing proof and seek help from them .

For your kind information you cannot change the width of the volume bar and brightness bar present in the quick pannel . Only you can change the length of the volume bar and brightness bar in the quick pannel. Thanks for your question.

By the help of smart switch you can keep a back up of data but I don't think you can go back at this stage.