You can download your e-Aadhaar card from the Unique Identification Authority of India (UIDAI) website or through the mAadhaar app:
Go to the UIDAI's MyAadhaar portal at https://myaadhaar.uidai.gov.in
Click Download Aadhaar under My Aadhaar
Select Virtual ID Number
Enter your virtual ID, security code, and click Send OTP
Enter the OTP sent to your registered mobile number and click Verify And Download
Enter the password to open the PDF file. The password is the first four letters of your name in capital letters and your year of birth. For example, if your name is Sameer Sarkar and your year of birth is 1990, your password would be SAME1990.