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HI  YOU HAVE TWO  THINGS GOING ON WITH  115mb    (31.7kb/sec)

115mb REFERS TO STORAGE CAPACITY mb MEANS MEGA BYTES

MB means Mega Bytes.
That should mean 1,000 bytes, but it is really 1,024 bytes.
4 MB = 4 Mega Bytes (4,096 bytes, actually)
8 MB = 8 Mega Bytes. (8,192 bytes, actually)
(has to be an exponent of 2.)
2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, et cetera)

MB usually defines the amount of data or information that can be stored or used at any one time.
Almost without exception, more MB means better / faster performance, whether you're talking about disk drive space, memory, cache, or whatever.
You would also need to consider the "access speed" of the
device, but a really safe bet would be that 8MB is definitely better than 4MB

THE LAST PART MEANS  HOW FAST OR SPEED  INFORMATION IS BEING LOADED ONTO AOR FROM A STORAGE DEVICE

Kilobyte (KB or K) = 1024 bytes (2 ^ 10) "binary kilobyte"
kilobyte (kB) = 1000 bytes (10 ^ 3) "decimal kilobyte"

Kilobit (Kb) = 1024 bits (2 ^ 10) "binary kilobit"
kilobit (kb) = 1000 bits (10 ^ 3) "decimal kilobit"

KBps = Kilobytes (1024 bytes) per second (binary)
kBps = kilobytes (1000 bytes) per second (decimal)

Kbps = Kilobits (1024 bits) per second (binary)
kbps = kilobits (1000 bits) per second (decimal)

bps = bits per second

Most browsers and a lot of FTP programs show transfer rates in KBps (kilobytes per second). So in order to get the approximate number of Kbps (kilobits per second) you need to know that there are 8 Kb (kilobits) in every KB (kilobyte). Thus if your browser is showing that you are downloading a file at 176 KBps you would then multiply 176 times 8 which would translate to 1,408 Kbps. The reverse can be used if your transfer rate is in Kbps then you divide that number by 8 to get your rate in KBps. Example:1400 Kbps divided by 8 equals 176 KBps transfer rate.

If you wanted to know how many bps (bits per second) you are transferring, all you need to do is a straight decimal conversion. Example: 1,408 Kbps would translate to 1,408,000 bps

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