Recreational/hobbyist UAS pilot reported flying their UAS in an active TFR without authorization. The UAS was also not registered.

Narrative

I inadvertently operated a sUAS flight inside a TFR zone. It was a single flight that lasted 2 minutes and 49 seconds. UAS details: DJI Mini 2; Firmware version XXX.XX.XXX; FlySafe database version XXX.XXX.XXI was unaware of the TFR as no visual indications were posted at the site and normally DJI FlySafe would indicate me about any unauthorized flight zones; it just let me launch the sUAS and I proceeded to a short flight within 400 ft. AGL and not over any crowd/people. Beside the TFR zone violation; the flight operated normally without incident at all phases.Quickly after landing; I was immediately met by a security officer from an adjacent private company property who called up the local authorities to file an incident report with the FAA. The security officer educated me about the TFR which I completely ignored of its existence. These events made me reflect about FAA regulations in place and that it is my own responsibility to be aware and comply to them. This sUAS has not flown in US airspace since and I do not plan to fly it again.Additionally; I brought this Country X-registered sUAS into the United States without proper FAA registration which I now understand; it was a violation as well. Again; this event alone deters me from ever flying a sUAS device into US airspace ever again and I should had never assumed that Country X rules were similar to US ones and also that the drone manufacturer software should not be my source of truth as far as authorized flying zones go. Lots of lessons learned here.