I mainly made these bags for my modded playthrough and was frustrated that their where slim to none item bags for some of my favorite mods so I rectified that.

Installation
1. Unzip
2. Drop Json files in C:\Program Files (x86)\Steam\steamapps\common\Stardew Valley\Mods\ItemBags\assets\Modded Bags or equivalent 
3. Enjoy!!!

Updating
Drop files in the same location and select replace files, all items will transfer

Available Bags (& Locations)
Mount Vapius Bags
Animal Products (Marnie)
Cooking Bag (Gus)
Crops Bag (Pierre)
Fishing Bag (Willy)
Mining & Artifacts Bag (Clint, Dwarf, & Krobus)
Seeds and Saplings (Pierre)

Forage of Ferngill Bags
Coastal (Willy)
Fruits & Nuts (Pierre)
Kombucha (Pierre)
Mushrooms (Pierre)
Roots (Pierre)
Wild Flowers (Pierre)

WildFlour's Atelier
Hot Barista (Gus)
Brewer (Pierre)
Confections (Pierre)
Canner (Pierre)
Cold Barista (Gus)
Florist (Pierre)
Frozen Confections (Pierre)
Gourmand (Pierre)
Pickling (Pierre)
Forage (Pierre)

East Scarp Bag (Pierre)

Never Ending Adventure and Circle of Thorns Bag (Pierre)

Ridgeside Bag (Pierre)

Adventurer's Guild Expanded (Marlon)

Dwarven Expansion Bags
Base (Dwarf)
Geology Expansion (Dwarf)
Mount Vapius Expansion (Dwarf)

The Geology Mod (Clint & Dwarf)

Nature's Bounty (Pierre)

Chocobo Valley (Marnie)

Distant Lands (Krobus)

Lunna Astray (Krobus)

Unique Fish Additions (Willy)

Phoenix Expansion (Marnie)

Pokemon Fish (Willy)

Pokemon Berry Bushes (Pierre)

Fish of Teyvat (Willy)

Special Thanks to all the Mod Creators who made these amazing mods and especially SlayerDharok for the Item Bags Mod