Is it permissible to benefit from data entered by a colleague or to divide the work of collecting similar data from the same files between two individuals, each assigned to do so, in exchange for a specific fee per file, while ensuring the accuracy of the entered data and receiving full financial compensation?

If the researcher does not intend to have multiple data entry personnel, and has not stipulated that you must perform the work yourself, then there is no harm in cooperating with your colleague to accomplish the task. However, if the researcher intends to have multiple personnel or has stipulated that you must perform the work yourself, then the condition must be fulfilled.