Sophisticated Backpacks is a powerful storage mod that transforms your inventory management with tiered backpacks and an extensive upgrade system. Unlike vanilla Shulker Boxes, these backpacks can be worn, upgraded, and customized with over 45 different upgrades that add functionality ranging from automatic item pickup to on-the-go smelting.
The mod features six backpack tiers from basic 
Leather to Netherite, each offering more storage slots and upgrade capacity. Whether you need a simple extra inventory or a fully automated mobile storage system, Sophisticated Backpacks provides the tools to create exactly what you need.
Getting Started
Crafting Your First Backpack
The basic Backpack requires Leather, 
String, and a 
Chest to craft. This gives you a portable storage container with 27 inventory slots and 1 upgrade slot, making it an excellent early-game storage solution that matches a single Chest in capacity.
To use the Backpack, right-click while holding it to open the inventory. You can also place it in the world by shift-right-clicking on a block. When placed, the Backpack becomes a block that other players can access, and it can connect to 
Hoppers and pipes for automation.
Wearing Your Backpack
If you have the Curios mod installed, the Backpack can be equipped in the Back slot from your inventory. This keeps your hands free while still providing quick access to your stored items. Press the B key (default keybind) to open a worn Backpack without removing it.
Players can also dye their Backpacks using any of the 16 vanilla dyes. Simply combine the Backpack with dye in a 
Crafting Table to change its color. The cloth and trim sections can be dyed separately for custom color combinations.
Upgrade Base
Before crafting any upgrades, you need 
Upgrade Bases. This core component is required for all upgrade recipes and is made from 
Iron Ingots, Leather, and String. Keep a stack of these on hand as you progress through the mod.
Backpack Tiers
Sophisticated Backpacks features six tiers, each offering more storage and upgrade slots. Higher tiers are crafted by surrounding the previous tier Backpack with the corresponding material. The Netherite tier requires a 
Smithing Table upgrade.
Backpack
Copper
Iron
Gold
Diamond
Netherite
The Leather Backpack matches a single Chest at 27 slots. Copper adds 18 more slots without additional upgrade capacity. Iron offers 54 slots (a Double Chest equivalent) with 2 upgrade slots, making it the first practical tier for automation builds.
Gold and 
Diamond tiers significantly increase both storage and upgrade capacity. The 
Netherite Backpack provides 120 slots and 7 upgrade slots, allowing for complex upgrade combinations. Additionally, the Netherite tier is fireproof and will not burn in lava.
Copper and 
Iron Backpacks both have the same number of upgrade slots. If resources are limited, consider saving your Copper and crafting the Iron Backpack directly from a Leather Backpack using 8 Iron Ingots.
Essential Upgrades
The upgrade system is where Sophisticated Backpacks truly shines. Upgrades are placed in the upgrade slots on the right side of the Backpack interface, and most can be toggled on or off without removing them. Many upgrades have basic and advanced versions, with advanced upgrades offering 16 filter slots instead of 9.
Pickup Upgrade
The 
Pickup Upgrade automatically collects items you walk over and places them directly into the Backpack. This is one of the most useful early upgrades, keeping your main inventory clear while mining or farming. Items must match the filter if one is configured.
The 
Advanced Pickup Upgrade adds 16 filter slots and additional filtering options like NBT matching and tag-based filtering. This allows for precise control over which items are collected.
Magnet Upgrade
The 
Magnet Upgrade pulls items toward you from a distance rather than waiting for you to walk over them. The basic version has a 3-block range, while the 
Advanced Magnet Upgrade extends this to 5 blocks. This pairs well with the Pickup Upgrade for efficient item collection.
Feeding Upgrade
The 
Feeding Upgrade automatically feeds you from food stored in the Backpack when your hunger drops. This eliminates the need to manually eat during extended mining or combat sessions. The upgrade will use the highest saturation food available first.
The 
Advanced Feeding Upgrade provides more control over when feeding occurs. You can set hunger thresholds and choose whether to prefer high-saturation or high-hunger-restoration foods based on your situation.
Void Upgrade
The 
Void Upgrade permanently destroys items that match its filter, preventing unwanted items from clogging your inventory. This is particularly useful for mining sessions where 
Cobblestone and 
Dirt would otherwise fill up storage quickly.
Be careful when configuring the Void Upgrade filter. Any items that enter the Backpack matching the filter will be deleted immediately with no way to recover them. Double-check your filter settings before enabling this upgrade.
Crafting Upgrade
The 
Crafting Upgrade adds a portable Crafting Table to your Backpack. Click the upgrade icon to access a 3x3 crafting grid that can pull materials directly from the Backpack inventory. Crafted items can be placed into either the Backpack or your main inventory.
Refill Upgrade
The 
Refill Upgrade automatically restocks items in your hotbar from the Backpack when a stack runs out. This is invaluable for builders placing thousands of blocks or players using consumables like Torches. Configure which slots to refill using the upgrade settings.
The 
Advanced Refill Upgrade adds the ability to refill specific hotbar slots and enables middle-click block picking from the Backpack. If you middle-click a block in the world, it will pull that block from your Backpack to your hotbar.
Storage Upgrades
Stack Upgrades
Stack Upgrades multiply how many items can fit in each Backpack slot, dramatically increasing total storage capacity. These upgrades stack multiplicatively, and you can install up to 3 Stack Upgrades per Backpack. The effects are impressive even at lower tiers.
Starter
Tier 1
Tier 2
Tier 3
Tier 4
Omega
Each tier is crafted by surrounding the previous upgrade with 8 storage blocks of the corresponding material. The Omega Tier requires 9 Tier 4 Stack Upgrades in a Crafting Table, providing effectively unlimited storage at 33,554,431x the normal stack size.
Stack Downgrades work in reverse, dividing stack sizes to limit how much can be stored per slot. Tier 1 divides by 8, Tier 2 by 16, and Tier 3 by 32. These are useful for sorting systems where you want only small quantities of items in specific containers.
Compacting Upgrade
The 
Compacting Upgrade automatically compresses items into their block forms. 
Raw Iron becomes 
Iron Blocks, 
Wheat becomes Hay Bales, and 
Redstone becomes 
Redstone Blocks. The basic version only works with 2x2 recipes.
The 
Advanced Compacting Upgrade supports both 2x2 and 3x3 recipes with 16 filter slots. This is extremely powerful for mining, as ores and materials automatically compress into blocks, saving massive amounts of inventory space.
Filter Upgrade
The 
Filter Upgrade restricts which items can enter or exit the Backpack through pipes and hoppers. This is essential for automation setups where you need specific items to go to specific containers. It does not affect manual item placement.
Processing Upgrades
Processing upgrades add 
furnace functionality directly to your Backpack, allowing on-the-go smelting, smoking, and blasting. Each processing type has manual and automatic variants, with auto versions pulling input and pushing output automatically.
Smelting Upgrade
The 
Smelting Upgrade adds a Furnace interface to your Backpack. Click the upgrade to access input, fuel, and output slots. Items smelt at the same speed as a regular Furnace, and the upgrade requires fuel like 
Coal or Wood to operate.
The Auto-Smelting Upgrade takes this further by automatically pulling smeltable items from the Backpack inventory and returning smelted items when complete. This creates a hands-free smelting system perfect for mining expeditions.
Smoking and Blasting Upgrades
The 
Smoking Upgrade functions like a 
Smoker, cooking food at double speed. The 
Blasting Upgrade works like a 
Blast Furnace, smelting ores and metal items at double speed. Both have automatic variants that pull and push items automatically.
You can only have one cooking upgrade (Smelting, Smoking, or Blasting) installed per Backpack. If you need multiple processing types, use separate Backpacks with the 
Inception Upgrade.
Fluid and Energy Storage
Tank Upgrade
The 
Tank Upgrade converts some of the Backpack's inventory slots into fluid storage. Each Tank Upgrade provides storage for one fluid type. You can install up to 2 Tank Upgrades per Backpack, allowing for two different fluids.
Fluids can be inserted by placing filled 
Buckets in the Backpack or through pipes when placed as a block. The Tank displays its current fill level and can be emptied back into Buckets.
Battery Upgrade
The 
Battery Upgrade adds Forge Energy (FE) storage to your Backpack, converting inventory slots into power storage. This stored energy can power compatible items in the Backpack or be transferred to machines when placed.
Pump Upgrades
The 
Pump Upgrade transfers fluids between the Tank Upgrade and adjacent blocks when the Backpack is placed. The 
Advanced Pump Upgrade can also interact with fluid containers in your hand and pick up fluid source blocks from the world.
The Experience Pump Upgrade specifically handles XP, transferring experience between the Tank Upgrade and the player. This allows you to store levels safely and retrieve them when needed for enchanting or repairs.
Advanced Upgrades
Inception Upgrade
The Inception Upgrade allows you to store other Backpacks inside the main Backpack. This creates a nested storage system where each contained Backpack maintains its own inventory and upgrades. The contained Backpacks can even have their upgrades function while nested.
This upgrade requires expensive materials including a 
Nether Star, making it a late-game option. Only one Inception Upgrade can be installed, and it must be in the outermost Backpack of a nested set.
Everlasting Upgrade
The 
Everlasting Upgrade makes your Backpack indestructible. It cannot be destroyed by fire, lava, explosions, or the void. If dropped, it will never despawn. This protection persists even when the Backpack is placed as a block.
Like the Inception Upgrade, this requires a Nether Star and 
End Crystals to craft. Only one can be installed per Backpack, but the protection it provides is invaluable for storing precious items.
Tool Swapper Upgrade
The 
Tool Swapper Upgrade automatically switches the tool in your hand to the most effective one for the block you are mining. Store your Pickaxe, Axe, and Shovel in the Backpack, and the right tool will be equipped when you start breaking blocks.
The Advanced Tool Swapper adds filter options and can swap weapons when attacking entities. It also includes hotkey swapping for situations where you want manual control over which tool is selected.
Workstation Upgrades
Beyond the Crafting Upgrade, several other workstation upgrades are available. The 
Stonecutter Upgrade adds stone cutting functionality. The 
Anvil Upgrade provides portable item repair and naming. The 
Smithing Upgrade allows Netherite upgrades and armor trims.
The 
Jukebox Upgrade turns your Backpack into a portable music player. The Advanced Jukebox can hold up to 12 music discs and offers playback controls including shuffle and repeat modes.
Alchemy Upgrade
The 
Alchemy Upgrade automatically uses potions, special foods, or 
Milk Buckets based on conditions you set. Configure it to drink Fire Resistance when burning or consume Milk to remove negative effects. The Advanced version adds effect-specific filtering.
Deposit, Restock, and Inventory Interaction
Several upgrades interact with external inventories like Chests, making storage management faster and more efficient.
Deposit Upgrade
The 
Deposit Upgrade moves items from your Backpack into a container when you shift-right-click it. Items matching the filter (or all items if no filter is set) will transfer to the target inventory. This is perfect for quickly offloading materials into sorted storage systems.
Restock Upgrade
The 
Restock Upgrade works opposite to Deposit, pulling items from containers into your Backpack when shift-right-clicking. Use filters to specify which items to collect. This is useful for quickly restocking supplies from organized storage.
Tips for Success
Building an effective Backpack setup requires planning. Start with a Pickup Upgrade to keep your inventory clear, then add Void for unwanted blocks like Cobblestone. As you progress, add processing upgrades for on-the-go smelting.
For mining, the combination of Magnet, Pickup, Void, Compacting, and Auto-Smelting creates a powerful automated system. Raw ores are collected, unwanted stone is voided, and everything else compresses and smelts automatically.
The Netherite Backpack's 7 upgrade slots enable complex setups. Consider using one 
Diamond Backpack for mining (with Stack, Compacting, and Void upgrades) and another for utility (with Feeding, Crafting, and Tool Swapper upgrades).
Plan your upgrade layout before committing resources. Basic upgrades work well early, but Advanced versions often replace two basic upgrades with better filtering. Check how many slots you need before upgrading your Backpack tier.
Mobs in the world have a 1% chance to spawn wearing Backpacks containing loot. Killing these mobs has a 50% base chance to drop the Backpack, increased by 15% per Looting level. Higher-tier Backpacks appear less frequently but contain better loot.
FAQ
By default, Shulker Boxes and other container items cannot be placed in Backpacks. This is a configurable setting that server administrators can change. Without the Inception Upgrade, you also cannot store other Backpacks.
You can install a maximum of 3 Stack Upgrades per Backpack. These multiply together, so three Tier 4 upgrades would give 16x × 16x × 16x = 4,096x the normal stack size per slot.
Check if the upgrade is toggled on using the keybinds or the toggle button in the interface. Some upgrades like Pickup and Magnet can be switched off. Also verify you have enough upgrade slots for all installed upgrades.
By default, other players can right-click your back to access your worn Backpack. This can be disabled in the Backpack settings menu. Server administrators can also disable this feature globally.
Most player-focused upgrades like Pickup, Magnet, and Feeding only work when the Backpack is worn or in your inventory. Processing upgrades like Smelting continue to function when placed. Placed Backpacks can also connect to pipes and hoppers.
Advanced upgrades have 16 filter slots compared to 9 in basic versions. They also include additional filtering options like NBT matching, tag-based filtering, and more precise control over upgrade behavior.
Place the Backpack in the center of a Crafting Table surrounded by the upgrade material. All contents, upgrades, and dye colors are preserved when upgrading tiers. You can even use JEI or EMI to look up the exact recipe.
