Once you download the file, verify its integrity before installing. A "better link" will often publish the MD5 or SHA-256 hash. For ESYS 3.36.2, typical hashes (from community sources) are:
The specific phrasing "better link" suggests a common ailment in the DIY automotive community: link rot and gatekeeping. ESYS software and its corresponding PSdZData files are enormous, often ranging from 50GB to over 100GB. They are proprietary to BMW and are not meant for public distribution. Consequently, legitimate links are removed due to copyright claims, while unofficial links die due to inactivity or expired file-hosting accounts.