diff --git a/src/garageS3.jl b/src/garageS3.jl
index a99484d..9399977 100644
--- a/src/garageS3.jl
+++ b/src/garageS3.jl
@@ -126,17 +126,12 @@ end
 
 # Arguments
 - `key::String`
-  The object key (name) in the bucket. Must not contain slashes (`/`).
+  The object key (name) in the bucket.
 - `data::Union{String, Vector{UInt8}}`
   The data to upload.
 
 # Return
-- `NamedTuple{(:api, :web)}`: A tuple with `api` and `web` URLs if the upload succeeds.
-- `nothing` if the key contains slashes (upload aborted with warning).
-
-# Notes
-- Slashes in keys are prohibited to prevent S3 listing issues. Use a flat naming
-  convention (e.g., `"users-1002.json"` instead of `"users/1002.json"`).
+- `NamedTuple{(:api, :web)}`: A tuple with `api` and `web` URLs.
 
 # Examples
 ```jldoctest
@@ -154,14 +149,7 @@ struct put_file
   storage::GarageStorage
 end
 function (pf::put_file)(key::String, data::Union{String, Vector{UInt8}}
-  )::Union{NamedTuple{(:api, :web), Tuple{String, String}}, Nothing}
-  # Check if the key contains a slash (virtual folder character)
-  if occursin('/', key)
-      @warn "Upload aborted! Slashes ('/') are not allowed in keys ('$key') to prevent S3 listing issues. Use a flat naming convention instead (e.g., 'users-1002.json')."
-      return nothing
-  end
-  
-  # Proceed if the key is flat
+  )::NamedTuple{(:api, :web), Tuple{String, String}}
   AWSS3.s3_put(pf.storage.config, pf.storage.bucket, key, data)
   println("Successfully uploaded: ", key)
 
@@ -180,17 +168,12 @@ end
 - `storage::GarageStorage`
   The storage client instance.
 - `key::String`
-  The object key (name) in the bucket. Must not contain slashes (`/`).
+  The object key (name) in the bucket.
 - `data::Union{String, Vector{UInt8}}`
   The data to upload.
 
 # Return
-- `NamedTuple{(:api, :web)}`: A tuple with `api` and `web` URLs if the upload succeeds.
-- `nothing` if the key contains slashes (upload aborted with warning).
-
-# Notes
-- Slashes in keys are prohibited to prevent S3 listing issues. Use a flat naming
-  convention (e.g., `"users-1002.json"` instead of `"users/1002.json"`).
+- `NamedTuple{(:api, :web)}`: A tuple with `api` and `web` URLs.
 
 # Examples
 ```julia
@@ -203,14 +186,7 @@ julia> result.web
 ```
 """
 function put_file(storage::GarageStorage, key::String, data::Union{String, Vector{UInt8}}
-  )::Union{NamedTuple{(:api, :web), Tuple{String, String}}, Nothing}
-  # Check if the key contains a slash (virtual folder character)
-  if occursin('/', key)
-      @warn "Upload aborted! Slashes ('/') are not allowed in keys ('$key') to prevent S3 listing issues. Use a flat naming convention instead (e.g., 'users-1002.json')."
-      return nothing
-  end
-  
-  # Proceed if the key is flat
+  )::NamedTuple{(:api, :web), Tuple{String, String}}
   AWSS3.s3_put(storage.config, storage.bucket, key, data)
   println("Successfully uploaded: ", key)
 
@@ -267,8 +243,8 @@ julia> keys = list_files(storage)
 ```
 """
 function list_files(storage::GarageStorage)
-    # Approach 2: s3_list_objects returns a Vector of Dicts with object details
-    objects = AWSS3.s3_list_objects(storage.config, storage.bucket)
+    # Use delimiter="" to get all individual keys (no grouping by "directory")
+    objects = AWSS3.s3_list_objects(storage.config, storage.bucket; delimiter="")
     return [obj["Key"] for obj in objects]
 end
 
diff --git a/test/runtests.jl b/test/runtests.jl
index 0ce41a2..ea29e64 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -118,14 +118,7 @@ using UUIDs: uuid4
         @test storage isa GarageStorage
     end
 
-    # --- put_file callable struct (slash detection) ---
-
-    @testset "put_file callable struct returns nothing for keys with slashes" begin
-        storage = GarageStorage("https://s3-api.example.com", "key", "secret", "bucket")
-        uploader = put_file(storage)
-        result = @test_logs (:warn, r"Upload aborted") uploader("a/b.json", "data")
-        @test result === nothing
-    end
+    # --- put_file callable struct ---
 
     @testset "put_file callable struct type is correct" begin
         storage = GarageStorage("https://s3-api.example.com", "key", "secret", "bucket")
@@ -139,32 +132,6 @@ using UUIDs: uuid4
         @test uploader.storage === storage
     end
 
-    # --- put_file function (slash detection) ---
-
-    @testset "put_file function returns nothing for keys with slashes" begin
-        storage = GarageStorage("https://s3-api.example.com", "key", "secret", "bucket")
-        result = @test_logs (:warn, r"Upload aborted") put_file(storage, "a/b.json", "data")
-        @test result === nothing
-    end
-
-    @testset "put_file function returns nothing for keys with multiple slashes" begin
-        storage = GarageStorage("https://s3-api.example.com", "key", "secret", "bucket")
-        result = @test_logs (:warn, r"Upload aborted") put_file(storage, "a/b/c/d.json", "data")
-        @test result === nothing
-    end
-
-    @testset "put_file function returns nothing for key with single slash in middle" begin
-        storage = GarageStorage("https://s3-api.example.com", "key", "secret", "bucket")
-        result = @test_logs (:warn, r"Upload aborted") put_file(storage, "folder/file.json", "data")
-        @test result === nothing
-    end
-
-    @testset "put_file function returns nothing for key with trailing slash pattern" begin
-        storage = GarageStorage("https://s3-api.example.com", "key", "secret", "bucket")
-        result = @test_logs (:warn, r"Upload aborted") put_file(storage, "a/b", "data")
-        @test result === nothing
-    end
-
     # --- Integration tests with real Garage server ---
 
     @testset "integration: full CRUD lifecycle" begin
@@ -219,15 +186,92 @@ using UUIDs: uuid4
         @test deleted_data2 === nothing
     end
 
-    @testset "integration: put_file rejects slashes even with real server" begin
+    @testset "integration: nested key CRUD - single level" begin
         storage = GarageStorage(
             "https://s3-api.yiem.cc",
             "GKb080154a2e5b19100b1b2c6e",
             "a2c6b1379c2f731d3e6e5a408dd4d6cffca7511717675f55114ff94828febca1",
             "testbucket"
         )
-        result = @test_logs (:warn, r"Upload aborted") put_file(storage, "folder/test.json", "data")
-        @test result === nothing
+
+        test_key = "single/slash/test-$(randstring(8)).json"
+        test_data = "{\"level\": 1, \"nested\": true}"
+
+        # Upload nested key
+        result = put_file(storage, test_key, test_data)
+        @test result isa NamedTuple
+        @test haskey(result, :api)
+        @test haskey(result, :web)
+        @test occursin("single/slash/", result.api)
+        @test occursin("single/slash/", result.web)
+
+        # Download and verify
+        downloaded = get_file(storage, test_key)
+        @test downloaded !== nothing
+        @test String(downloaded) == test_data
+
+        # Verify in listing
+        keys = list_files(storage)
+        @test test_key in keys
+
+        # Delete and verify gone
+        delete_file(storage, test_key)
+        @test get_file(storage, test_key) === nothing
+    end
+
+    @testset "integration: nested key CRUD - multi level" begin
+        storage = GarageStorage(
+            "https://s3-api.yiem.cc",
+            "GKb080154a2e5b19100b1b2c6e",
+            "a2c6b1379c2f731d3e6e5a408dd4d6cffca7511717675f55114ff94828febca1",
+            "testbucket"
+        )
+
+        test_key = "deep/nested/folder/subfolder/test-$(randstring(8)).json"
+        test_data = "{\"deeply\": \"nested\", \"path\": \"deep/nested/folder/subfolder/\"}"
+
+        # Upload deeply nested key
+        result = put_file(storage, test_key, test_data)
+        @test result isa NamedTuple
+        @test occursin("deep/nested/folder/subfolder/", result.api)
+        @test occursin("s3-api", result.api)
+        @test occursin("s3-web", result.web)
+
+        # Download and verify
+        downloaded = get_file(storage, test_key)
+        @test downloaded !== nothing
+        @test String(downloaded) == test_data
+
+        # Verify in listing
+        keys = list_files(storage)
+        @test test_key in keys
+
+        # Delete and verify gone
+        delete_file(storage, test_key)
+        @test get_file(storage, test_key) === nothing
+    end
+
+    @testset "integration: nested key with callable struct" begin
+        storage = GarageStorage(
+            "https://s3-api.yiem.cc",
+            "GKb080154a2e5b19100b1b2c6e",
+            "a2c6b1379c2f731d3e6e5a408dd4d6cffca7511717675f55114ff94828febca1",
+            "testbucket"
+        )
+
+        test_key = "callable/nested/test-$(randstring(8)).json"
+        test_data = "{\"callable\": true, \"nested\": true}"
+
+        uploader = put_file(storage)
+        result = uploader(test_key, test_data)
+        @test result isa NamedTuple
+        @test occursin("callable/nested/", result.api)
+
+        downloaded = get_file(storage, test_key)
+        @test String(downloaded) == test_data
+
+        delete_file(storage, test_key)
+        @test get_file(storage, test_key) === nothing
     end
 
     @testset "integration: get_file returns nothing for missing key" begin