You need to read your System's manual. Some <F-key> during BOOTing will lead you to a menu which will allow for out-of-box re-creation. Be aware... you usually lose EVERYTHING when this operation is done... that's why it's called out-of-box. It's nothing more than a DATA disk to use (and backup) as you wish. The ESP partition is most important for GPT BOOT disks. It contains all the partition information that used to be located in the Master BOOT Record for MBR-based disks. "2 (None)" is not important... it's part of a mandatory MicroSloth GPT partition template. "5 Image (None)" is the DELL out-of-box partition reference used to recreate your System if necessary. Every GPT formatted disk contains an EFI partition... the one on the BOOT disk is just as important as the one on the DATA disk. If and when you decide to start "imaging" your DATA disk, you will need this partition as well. If you decide eventually to just do File'n'Folder backups on that disk, the EFI partiton on that disk is not as important.