my 2.5" is in an external enclosure with power supply.

https://www.amazon.com/gp/product/B00LS5NFQ2/ref=oh_aui_search_asin_title?ie=UTF8&psc=1

I'm not sure, the official supply is 3A, right?

Yes, it is 3A as per Pine64 site.

I just ordered:

https://www.amazon.com/gp/product/B00LS5NFQ2/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

as the one that I am using is just a cradle for 3.5+2.5 that I bought several years ago to copy HDDs for my office. The question from earlier about the power part was that I was about to purchase a 2.5" case that didn't have power for $19.99, and found the one linked for $22.49 with power, so. But I am pretty sure this will suffice my needs as per you guys suggestions to go from writing onto the SD, to go USB3 to an external drive.

https://www.amazon.com/dp/B00LS5NFQ2 use this and your hdd will work fine. it needs to power itself.

Get a chromebook and use it to change all your passwords.

Take the hard drive out of the suspected infected computer and set it aside. Buy a new replacement drive and install it and install OS and your apps and anti-virus: using NINITE https://ninite.com/

Put the drive in a box and label it "possible infected drive" and get a usb HD toaster ( https://www.amazon.com/Sabrent-External-Lay-Flat-Docking-EC-DFLT/dp/B00LS5NFQ2/ref=sr_1_5?keywords=hard+drive+toaster&qid=1664239654&sr=8-5) and scan the drive from your computer.