For some reason, the TrueStorms meshes and sounds are packed in compressed BSA. It is EXTREMELY NOT RECOMMENDED to pack sounds into compressed BSA, as this reduces their quality, or can broke them. At the same time, the textures are packed in a separate UNCOMPRESSED BSA. But textures and meshes can be easily packed. In this case, there is no point at all in creating two separate BSAs, since the mod's resources do not exceed the 2 GB limit.

Now all mod resources are packed into one, uncompressed BSA. You won't lose anything from this. Maximum 10MB of space on your disk. I don't know if increasing the amount of BSA affects performance. But in any case, there is no point in having more than one archive.

You must remove TrueStormsSE - Textures.bsa, and replace TrueStormsSE.bsa

Note for vortex users: If you replace the BSA in the vortex mod folder - after deployment, vortex will by default prompt you to “Save” the changes, and use the deployed file. BUT, it will simply replace the new archive with the old one from skyrim data folder. MAKE SURE that vortex will use a stagged file in this case! Or, replace the BSA directly in the skyrim data folder, and save the changes in Vortex. And remove textures BSA.

My other mods:
Simple Golden Dishes
Dwarven Bow of Fate - Blur Removal

My patches/fixes:
KS Hairdos SSE - BSAed
Marked Treasure SSE - Patch Collection
True Storms - ReBSADed
Eyzek tiny's patch collection