Binance limits you to 3 months of data. To get a full year of transactions, you will need to download each CSV 4 times with different time windows. 

We suggest Jan 1 to March 31. April 1 to June 30. July 1 to Sept 31. Oct 1 to Dec 31. 

To get all your data in ZenLedger accurately, you need three files (TradeHistory, DepositHistory and WithdrawalHistory)

Alternatively, using API keys will import all the data much faster. The instructions are here:
http://support.zenledger.io/integrations/how-do-i-create-a-binance-api-key

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