Yea, thanks for linking that! Believe it or not I've already skimmed it! It really talks about storing physical stuff like computer hardware, cables, preserving prints on mice that kind of stuff. Really interesting. In the case of warrants where LE here have downloaded dig evidence from Google, Financial institutions etc, the article would apply to how LE store that (ie on a drive of their own, one of those stick things, in the cloud?, there needs to be foolproof back up)....
I've been trying for some time to find refs related to, I guess, investigative procedure re what is stored after a warrant is returned. From what I can gather from those warrants I've studied, Mr Mowbry always notes that so and so was downloaded, put on one of thsoe stick things (?) and placed in evidence at MPD (paraphrasing id that isn't obvious). This is a guess but reasonable I think, that not everything in that evidence room will make it into trial. I think all on the returned inventory is probably stored then for some of it, especially complex digi evidence, is then analysed by investigators as to its potential value for the prosecution. Exculpatory evidence, I belivee has to be kept and handed over though that is MOO too.