The following are all the major known resources for rarities that are still accessible or being kept alive via various hosts.
I have ensured they all have backups if the worst comes to the worst, but for now:
Please try these before asking for re-posts and 'have you got's'.
The Never Heard Symphonies - 2017/2018 edition.
Sorted in to eras and a comprehensive starting place for rare tracks by both Morrissey & The Smiths.
Skylarker's evolution of the collection has details here.
4.2 gig of goodness - download all or just individual tracks.
Hosted by myself.
Or mirrored here on Google Drive:
drive.google.com
Extra Track (And A Tacky Badge) Compilation.
My favourite fan-made Smiths compilation - essential to own IMHO.
Clear, exhaustive sources and thorough.
Full details about each part presented here.
1.2 gig - the full thing to sort through via a static link.
Hosted by myself.
Morrissey Intermission Music.
A huge array of artists that have been played or shown at Morrissey gigs.
Something I was happy to contribute to myself.
Full track lists here:
www.morrissey-solo.com
1.1 gig - have a good look through individual tracks or download by year.
Hosted by myself.
The Smiths MP3 Archive Collection.
6.64 gig of choice - has been around for ages and worth a look if you aren't bothered about FLAC.
https://mega.nz/#F!pIZgBAZT!CjA3briy9DX2nuy_GiSgtA
DavidA's Smiths Archive - Google Drive.
365 gig of everything you could want from FLAC audio to pro-shot videos, official & unofficial recordings et al.
Basically all of Smith Torrent's The Smiths content since starting.
DavidA's post regarding it with a brief guide here.
The clippings, tickets, tour books etc are all well curated and this is essential to own if you have space.
Hosted by DavidA.
drive.google.com
The Smiths - Recollections
Dirtee Rephlex's great collation of rarities.
Features: Original albums, B-sides, non-album tracks, live... with art and booklet.
Hosted by DavidA.
drive.google.com
Morrissey - Sisterama
Dirtee Rephlex continues with the collation of original albums, A's & B's, outtakes, live...
This time, with Morrissey as the focus.
Again with art work, booklets and good descriptions.
Hosted by myself (Vols. 1-12).
drive.google.com
This list isn't exhaustive and there's a couple more to add - which I will do later.
Certainly some stuff there to occupy people and dig through.
All credit, as always, to the people keeping this content alive for everyone to enjoy.
Regards,
FWD.
I have ensured they all have backups if the worst comes to the worst, but for now:
Please try these before asking for re-posts and 'have you got's'.
The Never Heard Symphonies - 2017/2018 edition.
Sorted in to eras and a comprehensive starting place for rare tracks by both Morrissey & The Smiths.
Skylarker's evolution of the collection has details here.
4.2 gig of goodness - download all or just individual tracks.
Hosted by myself.

Or mirrored here on Google Drive:
NHS 2017/18 (sorted by era) - Google Drive

Extra Track (And A Tacky Badge) Compilation.
My favourite fan-made Smiths compilation - essential to own IMHO.
Clear, exhaustive sources and thorough.
Full details about each part presented here.
1.2 gig - the full thing to sort through via a static link.
Hosted by myself.

Morrissey Intermission Music.
A huge array of artists that have been played or shown at Morrissey gigs.
Something I was happy to contribute to myself.
Full track lists here:

Morrissey "Intermission Music" 1991-2009 Various Artists Compilation (Updated 26 March '19)
The following is a collection of various artist's music used at gigs from the years: '91 - '09. Now with static links - peruse the tracks at your leisure and download what you want or have the whole thing as a zip. This may well be something I carry forward myself in to more recent gigs - time...

Hosted by myself.

DavidA's Smiths Archive - Google Drive.
365 gig of everything you could want from FLAC audio to pro-shot videos, official & unofficial recordings et al.
Basically all of Smith Torrent's The Smiths content since starting.
DavidA's post regarding it with a brief guide here.
The clippings, tickets, tour books etc are all well curated and this is essential to own if you have space.
Hosted by DavidA.
Smiths Archive - Public - Google Drive

The Smiths - Recollections
Dirtee Rephlex's great collation of rarities.
Features: Original albums, B-sides, non-album tracks, live... with art and booklet.
Hosted by DavidA.
MISC - Recollections [MP3, Misc, dirtee rephlex] - Google Drive
MISC - Recollections [MP3, Misc, dirtee rephlex]

Morrissey - Sisterama
Dirtee Rephlex continues with the collation of original albums, A's & B's, outtakes, live...
This time, with Morrissey as the focus.
Again with art work, booklets and good descriptions.
Hosted by myself (Vols. 1-12).
Sisterama - Google Drive

This list isn't exhaustive and there's a couple more to add - which I will do later.
Certainly some stuff there to occupy people and dig through.
All credit, as always, to the people keeping this content alive for everyone to enjoy.
Regards,
FWD.