Cybercriminals know that people search for "index of" files. They deliberately set up fake open directories. They will upload an ISO named AcronisTrueImage.iso that is, in reality, a ransomware dropper, a keylogger, or a boot-sector virus.

If you must use an index, verify integrity:

Disclaimer: This article is for educational purposes. Downloading software from unofficial "index of" directories poses security risks (malware, outdated versions). Acronis True Image is now known as Acronis Cyber Protect Home Office.