I'm in way over my head with even being on this website, let alone attempting to ask a question… but here's an attempt.
Basically, I want to have a password-protected folder on my Mac which is resizable as needed (sparsebundle seems to be best). It's recommended by Disk Utility to go with 128-bit AES because 256 is "slower".
This got me thinking, how slow is 128? Is this just while it's initially encrypting? If so, I don't mind. The problem is, I'll be storing session files for use with music software in this folder, which means constant reading and writing of files as I work.
Will the encryption slow me down? I'm hoping that once I put my password in and "open it up", it "stays open" and read/write speeds are as if it isn't even encrypted, but I suspect this isn't the case. I also don't want to create a speed bottleneck that renders my internal SSDs pointless. Thanks so much for any thoughts on this situation, much appreciated.