It is now a prevalent trade that hackers exist and they would do everything to get the information they want. There are even events for hackers so they could improve their skills and share information or knowledge. They are not all the bad hackers as there are companies or individuals who also help companies or firms to let heir security in check and that they could be safer from any attack. That is why companies sometimes offer them to hack their system and also to propose solutions.
Make sure to note errors so you would know which occurs more and not. Take note of the data you have given also. Another thing to stay safe is to have really a password that is not easy to be cracked. It makes a big difference. Do not have one password for many accounts. Another important measure is that have an authorized person to upload files that you could monitor and check regularly. Lastly, use the HTTPS.