I was finally successful in getting a SSD drive to boot in this Dell 22-3265 after more hours than I can remember.  The basic procedure offered by Tesla was followed. Used Macrium Rescue media on a USB stick to boot up the Dell to which was attached an external Toshiba HHD formatted NTFS via SATA-USB wire.  Backed up the slow Seagate HHD in the Dell to the external drive as an image. Removed the Seagate from the Dell and replaced it with a new WD Blue SSD 500 GB which was “bare metal” (never partitioned). The Dell system BIOS was left in SATA mode opposed to old ATA The interface setting was left at AHCI BIOS set at UEFI, Boot security enabled Booted Macrium and restored the image on the external drive to the WD on the Dell’s SATA port. The Dell booted from the SSD on first try and ran well. The fly-in-the-ointment resulted from attempting all different ways of cloning the Dell to a Samsung EVO 850 1 TB SSD using, first Acronis TI and then, Macrium.  Tried direct cloning HHD to SSD, then imaging backup and restore.  The Samsung was cleaned in Diskpart between each operation.  Though the cloning/imaging seemed successful and the files on the drive as well as the partitions looked correct and BCDEdit showed correct arrangement of data, the SSD would never boot in the Dell.  The fix boot in Macrium had also been run. Attached via SATA to my Asrock computer, the Samsung SSD did boot—but I don’t if it’s using BCD data from my M.2 boot drive or if it’s using BCD from itself.  The M.2 has no disable option in BIOS and it’s too much hassle to remove the drive just to see if the Samsung will boot by itself.  My conclusion is that either the Samsung SSD has some defect or it is incompatible with this particular Dell system.  My original inquiry at the beginning was regarding a selection under Boot in the Dell BIOS entitled “File Browser Add Boot Option”.  Now I notice that whatever HHD or SSD one attaches to the SATA port shows up in the Add Boot Option.  I guess in some cases, one has to specify a driver for some drives in the various options shown. 
In the Inspiron 22-3265 with AMI BIOS ver 1.40 there is an option under UEFI to add a boot device.  Numerous choices are made available to select: Could someone please explain how to use this to add a bootable cloned disk to the storage device list?  Does a user need to have driver available to install?  The system is AHCI, no RAID option available thus no RST driver necessary. Most times the BIOS just "sees" what is attached to SATA ports and reports them.    In many Dell products, one has to configure the device into the firmware.    Is there a manual available to explain what the above items are for and how to configure them? Thanks
New Boot device add in UEFI BIOS