diff --git a/AquaNet/src/libs/i18n/en_ref.ts b/AquaNet/src/libs/i18n/en_ref.ts
index 4c16ffdb..18c74716 100644
--- a/AquaNet/src/libs/i18n/en_ref.ts
+++ b/AquaNet/src/libs/i18n/en_ref.ts
@@ -92,7 +92,7 @@ export const EN_REF_HOME = {
   'home.linkcard.account-card': 'Account Card',
   'home.linkcard.registered': 'Registered',
   'home.linkcard.lastused': 'Last used',
-  'home.linkcard.enter-info': 'Please enter the following information',
+  'home.linkcard.enter-info': 'Please enter the following information, or drag and drop your aime.txt / felica.txt file here',
   'home.linkcard.access-code': 'The 20-digit access code on the back of your card. (If it doesn\'t work, please try scanning your card in game and enter the access code shown on screen)',
   'home.linkcard.enter-sn1': 'Download the NFC Tools app on your phone',
   'home.linkcard.enter-sn2': 'and scan your card. Then, enter the Serial Number.',
diff --git a/AquaNet/src/libs/i18n/zh.ts b/AquaNet/src/libs/i18n/zh.ts
index 07b6294b..dbc7e8ed 100644
--- a/AquaNet/src/libs/i18n/zh.ts
+++ b/AquaNet/src/libs/i18n/zh.ts
@@ -102,7 +102,7 @@ const zhHome: typeof EN_REF_HOME = {
   'home.linkcard.account-card': "账户卡",
   'home.linkcard.registered': "注册于",
   'home.linkcard.lastused': "上次使用",
-  'home.linkcard.enter-info': "请输入以下信息",
+  'home.linkcard.enter-info': "请输入以下信息，或将 aime.txt / felica.txt 文件拖放到此区域",
   'home.linkcard.access-code': "卡背面的20位卡号 (如果没有, 请尝试在游戏中扫描您的卡, 并输入屏幕上显示的卡号)",
   'home.linkcard.enter-sn1': "在您的手机",
   'home.linkcard.enter-sn2': "上下载 NFC Tools 并扫描您的卡。然后输入显示的 SN 号。",
diff --git a/AquaNet/src/pages/Home/LinkCard.svelte b/AquaNet/src/pages/Home/LinkCard.svelte
index 77ce9218..8c9e4dde 100644
--- a/AquaNet/src/pages/Home/LinkCard.svelte
+++ b/AquaNet/src/pages/Home/LinkCard.svelte
@@ -161,13 +161,10 @@
   let inputAC = ""
   let errorAC = ""
 
-  function inputACChange(e: any) {
-    e = e as InputEvent
+  function inputACChange() {
     // Add spaces to the input
     const old = inputAC
-    if (e.inputType === "insertText" && inputAC.length % 5 === 4 && inputAC.length < 24)
-      inputAC += " "
-    inputAC = inputAC.slice(0, 24)
+    inputAC = inputAC.replace(/\D/g, '').replace(/(.{4})/g, '$1 ').replace(/ $/, '')
     if (inputAC !== old) errorAC = ""
   }
 
@@ -176,13 +173,10 @@
   let inputSN = ""
   let errorSN = ""
 
-  function inputSNChange(e: any) {
-    e = e as InputEvent
+  function inputSNChange() {
     // Add colons to the input
     const old = inputSN
-    if (e.inputType === "insertText" && inputSN.length % 3 === 2 && inputSN.length < 23)
-      inputSN += ":"
-    inputSN = inputSN.toUpperCase().slice(0, 23)
+    inputSN = inputSN.toUpperCase().replace(/[^0-9A-F]/g, '').replace(/(.{2})/g, '$1:').replace(/:$/, '')
     if (inputSN !== old) errorSN = ""
   }
 
@@ -209,9 +203,29 @@
   function isInput(e: KeyboardEvent) {
     return e.key.length === 1 && !e.altKey && !e.ctrlKey && !e.metaKey && !e.shiftKey
   }
+  
+  async function dropFile(e: DragEvent) {
+    e.preventDefault()
+    e.stopPropagation()
+    const file = e.dataTransfer?.files[0]
+    if (!file) return
+    switch (file.name.toLowerCase()) {
+      case "aime.txt":
+        inputSN = ""
+        inputAC = await file.text()
+        inputACChange()
+        break
+      case "felica.txt":
+        inputAC = ""
+        inputSN = await file.text()
+        inputSNChange()
+        break
+    }
+  }
 </script>
 
-<div class="link-card">
+<!-- svelte-ignore a11y-no-static-element-interactions -->
+<div class="link-card" on:drop={dropFile} on:dragover={(e) => e.preventDefault()}>
   <h2>{t('home.linkcard.cards')}</h2>
   <p>{t('home.linkcard.description')}:</p>