XPS 15 - 512GB SSD Volumes

The EFI System Partition is what all systems that boot in UEFI mode boot from.  UEFI can't natively read NTFS, so the EFI partition is formatted as FAT32 and contains the bootloader, which turns around and loads Windows from your OS partition.

If you use a tool like Diskpart rather than Disk Management, you'll also see a very small MSR partition, probably 16-128MB.  That's also required for systems that boot in UEFI mode.

The 13GB Recovery partition probably contains an image of your system as it shipped from the factory in case you ever want to recover to that state.  I'm not sure why the Support app isn't seeing that.

The fact that you have 3 other Recovery partitions is strange to me.  They're all sized to indicate that they're used for the Windows Recovery Environment, which is a small partition containing tools to help diagnose and repair an unbootable system.  A clean install creates 1, and sometimes updating to a new release of Windows 10 causes your system to create another one immediately after your C drive (by shrinking your C drive and using the freed up space) if the existing partition is too small for the new release's requirements AND it can't be resized in place.  At that point, the original Recovery partition sits there as dead weight since it's no longer used.  But once that second partition right after your C drive has been created, future releases should simply keep shrinking your C drive as needed to make more room for that second Recovery partition, so I don't understand how you've ended up with 3.  If you want to see which of those Recovery partitions is actually being used, open an Elevated Command prompt and enter "reagentc /info", to see a partition number, then use a tool like diskpart to see which partition has that number.  Note that partition numbering is NOT always left to right; it's technically oldest to newest, which is usually but not always the same.

@Saltgrass, 1.05 GB for diagnostics seems pretty extreme, and modern Dell systems have their diagnostics built into the UEFI firmware.  I can run them on my system that has a clean install.  With respect to the Recovery partitions, you've got it backwards.  450MB is the size of the Recovery partition created on a clean install of Win10 1607 and 1703 (1709 raised it to 500MB), and the LARGER Recovery partition would be the one Windows creates if the existing partition isn't large enough for the new release's requirements.  It wouldn't make sense to abandon an 826MB partition in favor of a new 450MB partition, since the contents of the Recovery partition is replaced when a new release is installed -- which is all why as mpfeifer found, the 826 MB partition is that one that's currently in use as the Recovery partition.  The reason the new Recovery partitions are larger than they would've been in a clean install of that new release is because according to TechNet documentation, there are rules about how much free space must exist on the new partition based on the original size of the partition, e.g. "If the partition is more than 500 MB, it must have 100 MB free" (I made those numbers up), so complying with those rules can create some odd sizes.

@mpfeifer, creating rescue drives would definitely not create new partitions on your disk.  I don't know what Support app you're working with since I prefer to use other tools for system images and other backups and I have zero interest in ever returning to a factory image; I'd rather just do a clean install using regular Microsoft media.  But it appears that you do in fact have a factory image restore partition, so if whatever app you're using is supposed to see that, I'm not sure why it isn't, unless maybe it doesn't contain a usable image for some reason?  But as Saltgrass said, you don't really have to worry about the number of partitions.  Yes it's aggravating that they're taking up space especially if you don't care about the purpose they serve (or they're literally serving no purpose), but in order to reclaim that space in a useful way, you'd have to rearrange your whole partition layout, which would basically involve capturing an image of your system and then restoring it with a custom partition sequence and excluding certain partitions from the restore, which in turn requires an imaging tool that offers that kind of flexibility.

Thanks.  It looks like my partition 4 (826MB) one is being used for the recovery environment.   Where should I see it in the Support App?  

If you create new Windows Recovery Drives, does that create a new partition?  I don't think so but curious.  When I first started the laptop it told me to make a recovery USB drive.  I assumed that was because they didn't put a recovery partition, but it looks like they did.  

Thanks

Mark

Saltgrass - Thanks.  It is a brand new laptop just purchased, so just curious.  

If it all seems ok, I will go on with my business.  Was just curious.  

Thanks,

Mark

It seems ever so often the type or number or partitions is changed.  I am guessing the 1.05 GB partition is for the bootable diagnostics.

The 450 MB partition is the size of one Windows would add after the C partition when upgrading from one OS or build to another, if needed to replace the original (826 GB) one.  

As jphughan mentioned, the 12 GB is for the OEM recovery data.  On newer systems it contains the OEM utilities which, when combined with the Win 10 recovery drive will recovery your system to a factory install.  Yours may not be that new if it has the 450 MB partition and may actually have some type of OS image.

A GPT drive can support around 256 partitions so not really a reason to be concerned as far as numbers.