I will be honest with you : USB miners are not profitable anymore, since a long time, either they are ran on common computers or on a Raspberry Pi. So I suggest you to buy no USB miner at all, since you will never break even. That would be wasted money.
Ohhh thats sad to hear..
Even I wont make a 0.000000000000000000000000000000000000000000001 bitcoin?
If I can make even smallest value, I will try. Can you help me? Thanks
Well you could make but not from bitcoin directly. You can still make money with altcoins but sadly not with the SHA256 ones because of the ASICS on the market. And as for SHA it's true that you could try but it certainly would be a waste. Let's say the eruptor mines at 330MH/s which means that it would earn around 17 satoshi a day... https://alloscomp.com/bitcoin/calculator here calculate for yourself.