@forest3456 Curious where you got the idea that no A&M system school had a marching band or ensemble bands. And easy google search of each school “bands” brought up websites for every system school
A&M Kingsville http://www.tamukbands.com/
Tarleton https://www.tarleton.edu/band/index.html
Prairie View http://www.pvamu.edu/marchingstorm/about-us/
West Texas A&M http://www.wtamu.edu/academics/school-of-music-bands.aspx
A&M Commerce http://www.tamuc.edu/academics/colleges/humanitiesSocialSciencesArts/departments/music/ensembles/instrumental/marchingband/default.aspx
A&M Corpus Christi http://cla.tamucc.edu/music/pages/music_bands.html
PSA isn’t for everyone and the major you want at A&M must participate in PSA. Mays does not participate in PSA. What major are you wanting to pursue?
Are you interested in the A&M marching band and the Corps once you transfer or one of the other bands/orchestras? https://musa.tamu.edu/university-bands/
If you are still able/interested in participating in PSA, these are the participating majors. http://admissions.tamu.edu/PSA/
If you attend a non system school, follow the transfer course sheet for the major you want to transfer into. Most majors will require you to complete 2 full semesters before being admitted. You can apply beginning of second semester though Spring grades may have to be submitted before admitted. Each major has requirements so be sure to take note. http://admissions.tamu.edu/transfer/majors