The USB device is not in the list. So you won't format it. It will be recognized as
sda1 is the first partition created by windows to store boot loader there.Let it be as it is.
sda4, I really don't know what it is. Possibly 8GB of hard disk in unused state? You can see in windows by running
diskmgmt.msc. You can keep it as it is or create a new 8GB partition or extend lenevo recovery partition by 8GB. (You can't merge the portion to any other partition as it resides after Recovery partition)
Regarding formatting.. here are some simple instruction. Hope this helps (the following considers you are replacing windows with ubuntu, not dual booting. This also delete all data in the C drive, so backup before you do anything),
Something Else when installing ubuntu and selecting where to install it.(As you already did in screenshot)
sda2, click delete.
Now you will get a free partition, select that, click on
new. Select partition file system as
SWAP. Enter the required size. (A
SWAP partition should be 1.5 x Sizeof RAM.) If you have large RAM like 4-6GB, you may skip this part. However, hibernation will not work without swap partition.
Click on rest of the free space, click on
new, select file system type as
ext3 and mount point
device for instllaing bootloader is set to sda (your hard disk)
Click on install to install ubuntu on that partition.