About RAM and internal storage space in your phone's settings

has been on the phone settings in the RAM and internal storage space do not understand, do mobile phone for three years I was confused, and in addition today the Boss let me divide the NAND region as a cell phone internal storage use, I completely paste, and then determined to understand the following several concepts:

The following concepts are for Android phones:

RAM: And Vulgar said phone memory, mobile memory, the size of RAM directly determines how much you can run the program at the same time mobile phone running speed

Internal storage: Mobile phone basically (here specifically MTK platform ha, other platforms do not know) will be in the form of NAND flash+ram, some will add a emmc, you see in the phone internal storage space size and is the total volume of NAND flash space minus

Preloader

Pro_info

NVRAM

Protect_f

protect_s

seccfg

UBOOT

bootimg

RECOVERY

Sec_ro

MISC

LOGO

expdb

FAT

ANDROID

CACHE

Bmtpool

These areas occupy the following Usrdata Total Capacity

you may sometimes hear what the pros say about 4+4, 4+2,4 that represents 4Gb of NAND space 2 that represents 2Gb of RAM space