Account information for a plurality of accounts and transaction information for a plurality of transactions conducted among the plurality of accounts are analyzed. A transaction volume threshold is determined based on the analysis. A first subset of the accounts is identified. The first subset of account each corresponds to an amount of conducted transactions below the transaction volume threshold. A second subset of the accounts is identified. The second subset of the accounts each corresponds to an amount of conducted transactions above the transaction volume threshold. In response to the identification of the first subset and the second subset of the accounts, the account information and the transaction information are stored into an electronic database collectively for the first subset of the accounts, and the account information and the transaction information are stored into the electronic database separately for the second subset of the accounts.