"A Little Agency - Sierra Model - Sets 01-25 -Plus 3 Custom Sets-.rar" appears to be a compressed archive containing a series of photo/model sets titled "Sierra" produced by "A Little Agency" (or a similarly named content creator). The filename suggests it includes 25 numbered sets plus three custom sets. Below is a concise, practical guide for what this archive likely contains, how to inspect it safely, and legal/ethical considerations.
Keep in mind that this guide is general, and specific steps may vary depending on your software and system configuration. "A Little Agency - Sierra Model - Sets